PostfixJobs

I need a single, reliable inbox set up on my existing DigitalOcean droplet so that our clients can start writing to us directly. The domain is already live and pointing to the droplet; all that’s missing is a properly configured mail stack. I’m flexible on the underlying software—Postfix, Exim, Dovecot, or a sensible combination—so feel free to propose the stack you’re most comfortable hardening and supporting. Security (TLS), clean DNS records (MX, SPF, DKIM, DMARC) and straightforward logging are critical, but the overall footprint should stay light since we only require one mailbox for now. Deliverables • Install and configure the chosen mail server stack on the droplet • Update DNS to route mail through the new inbox with validated S...

I ...many full inboxes as I like under my own domain, strictly for internal company use. I will be creating each mailbox myself, so the focus is on providing the underlying configuration and a clean Roundcube webmail interface where every new account automatically has its own secure password and can both send and receive without issues. Here’s what I expect: • Install and configure the mail stack (Postfix/Dovecot or comparable) on my VPS or cPanel server so it supports unlimited mailboxes on the domain. • Deploy Roundcube, theme it lightly with my logo, and make sure each mailbox can log in independently via HTTPS. • Set DNS (MX, SPF, DKIM, DMARC) for solid deliverability. • Document, step-by-step, how I can manually add or delete accounts and rese...

...stack must comfortably run anything from plain HTML to PHP-driven WordPress and full e-commerce builds, so current versions of Apache or Nginx, multiple PHP versions, and MariaDB/MySQL are expected. Email has to be part of the same box. I am leaning toward a Roundcube or Cosmos webmail front-end, but I am open to a better suggestion if you can justify it. Under the hood, please wire up a solid Postfix/Dovecot combination with SPF, DKIM, and DMARC so outgoing mail lands in the inbox and not spam. Deliverables • Latest LTS Ubuntu installed, updated, and secured (UFW and basic hardening) • Webmin/Virtualmin configured over HTTPS, ready for virtual-host creation • Web stack (Apache or Nginx, PHP-FPM, MariaDB/MySQL) tuned for performance • Let’s Enc...

I need a complete, self-hosted email solution for a small business that I’ll be running on a Linux server (Ubuntu or CentOS—whichever you feel is best for the chosen stack). The key objective is to move away from third-party providers and gain full control over our mail, security, and data compliance. The specific mail-transfer agent is still open: Postfix, Exim, Mailcow or another proven alternative can be used, as long as the end result is stable, secure, and straightforward to maintain. What I expect from you: • A production-ready mail server configured with SMTP, IMAP/POP3, spam and virus filtering, DKIM, SPF, DMARC, and valid SSL/TLS certificates. • Simple webmail access and clear instructions so that I can add domains, users, and aliases without t...

I have a clean Linux server waiting for a full Horde Groupware Webmail Edition deployment. Your task is to turn that box into a production-ready mail system, complete with secure web access, working SMTP/IMAP services, and a short hand-over guide. Key deliverables • Horde Groupware Webmail Edition installed and reachable over HTTPS • MTA (Postfix or Exim—your call) and IMAP/POP service configured, spam-free mail flow verified with external inboxes • SSL/TLS certificate in place (Let’s Encrypt is fine) • One test domain and mailbox created, end-to-end send/receive confirmed • Brief documentation of the steps and configs applied I will supply the distro details, DNS records, and root credentials once we agree on timing. Success is a s...

I have a freshly-provisioned VPS that needs to handle all of my domain’s email. The core job is to turn this blank server into a fully functioning mail system that can send and receive reliably while passing modern deliverability checks. Here’s what I need done: • Install and configure the mail transfer and delivery stack on the VPS (Postfix/Dovecot or an equivalent, as long as it is stable and well-documented). • Enable secure access over SMTP, IMAP and POP3 with valid TLS certificates. • Create the first mailboxes and aliases, confirm they work from common clients such as Outlook, Gmail (via external POP/IMAP), and Thunderbird. • Set up DNS records—SPF, DKIM, DMARC and the appropriate A/MX entries—so that test messages land in ...

...and experienced Linux server administrator to take real ownership of live production infrastructure. The goal is long-term cooperation with one technically strong person who communicates clearly, works pragmatically, and takes responsibility for the systems they manage. Infrastructure • VPS 20 (Contabo) — n8n, Docker, Nextcloud, Vikunja, Uptime Kuma • VPS 30 (Contabo) — Plesk, WordPress, Email (Postfix, Dovecot, SpamAssassin) • VPS 30 (Contabo) — PrestaShop live shop (Nginx + Apache, Cloudflare, PHP-FPM) • Dedicated Backup Server (Interserver) — automated backups, Google Drive, NFS Your First Task — System Cleanup & Security Takeover The previous administrator left the systems in a partially configured and insecure state. B...

...needed, configure SPF, DKIM, DMARC, and keep us CAN-SPAM compliant. • Schedule and send 100 k emails daily, monitor bounces and complaints in real time, and adjust settings to keep the inbox rate high. • Supply me with concise daily reports covering total sends, opens, clicks, hard/soft bounces, and spam complaints. If you already run your own servers or have experience with tools like Postfix, PowerMTA, MailWizz, Sendy, or Amazon SES, let me know—anything that makes hitting volume without throttling or blacklisting easier. Reliability and transparency are more important to me than fancy dashboards; as long as the campaigns go out on time and the metrics look healthy, we’re good. Please outline the approach you’d use, the platform or software...

...MailWizz installed, secured, and made ready for production mail-outs. You’ll handle everything from uploading the script to applying best-practice server tweaks so the platform runs smoothly and inbox delivery starts off on the right foot. The VPS is completely under my control, so you’re free to tune PHP, MySQL/MariaDB, and the web server of your choice. I’m open to whichever MTA you recommend (Postfix, Exim, etc.) as long as it pairs reliably with MailWizz and supports DKIM, SPF, DMARC and bounce/feedback loop processing. Deliverables I expect: • Fresh MailWizz installation with all required PHP extensions enabled • Optimised server configuration, cron jobs, and queue settings • Proper domain-level authentication (SPF, DKIM, DMARC) and bou...

...random intervals. The stack currently runs Mailman3 alongside Python 3.13, protected by iptables and fail2ban. I need someone who truly knows Debian internals, Mailman3 architecture and Python debugging to locate the root cause, restore stability and lock the box down against known (and unknown) Mailman-related exploits. You will have full SSH access so you can: • comb through systemd, Mailman, Postfix and kernel logs to pinpoint the fault; • verify every package dependency and rebuild/re-install anything corrupted; • harden iptables, confirm fail2ban jails are effective and patch any CVEs that apply to Mailman3 or its Python environment; • produce a concise report that explains the failure, documents each remediation step and lists any further action...

...at The goal is a seamless transition with no mail loss, minimal downtime, and full preservation of existing accounts, settings, calendars, and filters. Key deliverables: • Create a verified full-system backup and rollback plan • Carry out the in-place upgrade from 10.x to the release available on the link above • Resolve any dependency or schema changes, including postfix, LDAP, and nginx adjustments • Re-enable all services, test inbound / outbound mail flow, ActiveSync, and web client access • Provide a short post-upgrade report detailing steps taken, issues found, and how they were fixed SSH access and current OS details will be supplied once we agree on timing. Please be comfortable with ZCS CLI tools, rolling upgrades, and live troublesh...

Job Description I migrated websites from a Plesk VPS to a new AlmaLinux VPS with Virtualmin. The migration was done using: rsync /var/www/vhosts → /home rsync /var/lib/mysql → new server The new server environment: OS: AlmaLinux Control Panel: Virtualmin Web Server: Apache PHP: PHP-FPM Database: MariaDB Mail: Postfix + Dovecot SSL: Let's Encrypt Current Issues Some parts of the migration work, but several problems remain: 1. Website Issues Some websites show Index of / Some domains open another website instead of their own Some sites show 500 Internal Server Error Some sites show database connection errors 2. WordPress Issues WordPress sites sometimes redirect incorrectly Some sites show ERR_TOO_MANY_REDIRECTS Some sites show Error establishing...

Job Description I migrated around 120 websites from a Plesk VPS to a new AlmaLinux VPS with Virtualmin. The migration was done using: rsync /var/www/vhosts → /home rsync /var/lib/mysql → new server The new server environment: OS: AlmaLinux Control Panel: Virtualmin Web Server: Apache PHP: PHP-FPM Database: MariaDB Mail: Postfix + Dovecot SSL: Let's Encrypt Current Issues Some parts of the migration work, but several problems remain: 1. Website Issues Some websites show Index of / Some domains open another website instead of their own Some sites show 500 Internal Server Error Some sites show database connection errors 2. WordPress Issues WordPress sites sometimes redirect incorrectly Some sites show ERR_TOO_MANY_REDIRECTS Some sites show Error e...

...mails after the emails were moved to a 3rd party provider (microsopft Exchange), and I need an experienced set of eyes to put things right. I suspect the form submission email is not leaving the server environment. What I need from you: • Pin-point the exact misconfiguration in my DNS or email stack. • Apply the correct fixes directly in DirectAdmin and, if required, the underlying Exim/Postfix configs. • Verify SPF, DKIM, DMARC and reverse DNS all line up for clean delivery. • Prove success by sending test emails to external providers (Gmail, Outlook, Yahoo) and sharing headers that show a passed status. • Provide a brief, bullet-style hand-over note so I know precisely what changed and how to avoid the issue next time. Root access to th...

I need a complete, self-hosted email solution for a small business that I’ll be running on a Linux server (Ubuntu or CentOS—whichever you feel is best for the chosen stack). The key objective is to move away from third-party providers and gain full control over our mail, security, and data compliance. The specific mail-transfer agent is still open: Postfix, Exim, Mailcow or another proven alternative can be used, as long as the end result is stable, secure, and straightforward to maintain. What I expect from you: • A production-ready mail server configured with SMTP, IMAP/POP3, spam and virus filtering, DKIM, SPF, DMARC, and valid SSL/TLS certificates. • Simple webmail access and clear instructions so that I can add domains, users, and aliases without t...

...so I can send only transactional emails such as order confirmations and password-reset links from my application. SSL/TLS encryption is mandatory; every connection to the server must negotiate a secure channel before any message is accepted. I already have a VPS and a dedicated domain ready to point wherever you ask. Your work should cover the full chain of deliverability: installing the MTA (Postfix, Exim, or whichever stack you prefer), generating and applying SSL certificates, and setting up SPF, DKIM, and DMARC records so common providers do not flag the messages as spam. Once everything is in place, send a live test from a sandbox account and show the headers hitting inbox with a clean score. Deliverables • Working SMTP service reachable on the designated hostname a...

Can you please install and connect postfix and cubemail without customization. You can copy our old system if you like.

My Zimbra installation has suddenly started dropping messages in both directions—nothing is reliably coming in or going out. I’m looking for someone who can jump straight into troubleshooting mode, sift through the logs, ... DKIM, DMARC), queue corruption, or a misbehaving transport rule. • I have root and admin access ready for you as soon as we begin. • The goal is a clean bill of health: messages accepted, queued, and delivered without delay, with clear documentation of what was fixed so I can avoid a repeat. Deliverables 1. Root-cause analysis with log references 2. All corrective actions applied (Postfix, Anti-Spam/Anti-Virus, DNS records, etc.) 3. A brief hand-over document summarising changes and any follow-up recommendations I’m re...

...campaigns. • A webmail front end so I can manage mailboxes, lists, and content without touching the command line. • Proper authentication (SPF, DKIM, DMARC or whatever you recommend) already set up so messages land in the inbox. • Clear, step-by-step handover documentation that lets me add new domains, warm up IPs, and monitor bounce/complaint rates. 2. Tech preferences I’m open to Postfix, Exim, PowerMTA, or any comparable stack—as long as it handles bulk traffic cleanly and gives me a straightforward UI. If you have licensing requirements for a commercial MTA, note that up front; otherwise feel free to propose an open-source route paired with something like MailWizz, Sendy, or another lightweight panel. 3. Success criteria The fir...

We need from Pakistan or India. We need for guidance. • Complete server hardening and best-practice mail stack installation (Postfix or Exim, Dovecot, SpamAssassin, etc.). • Proper DNS records—SPF, DKIM, DMARC, rDNS—set up and verified. • IP and domain warm-up plan to protect sender reputation. • Web-based dashboard or lightweight MTA/ESP front-end that lets me import lists, create campaigns, schedule sends, and view real-time stats. • Step-by-step documentation so I can replicate or maintain the configuration without outside help. If you prefer working with a particular control panel (MailWizz, Interspire, Postal, Mailcow, CPanel/WHM), let me know; I’m flexible as long as deliverability remains the priority. Please outline you...

My Magento store was migrated to a Hostinger VPS and, ever since the move, no “Order Confirmation” messages reach customers or my own business inbox. I’m routing mail through a third-party provider such as Gmail/SendGrid, but I’m unsure whether the settings were carried over correctly during the migration, or whether something deeper in Magento, postfix/Exim or the VPS firewall is blocking outbound traffic. Or is an SMTP issue where a free extension needs to be added to Magento? Hostinger support has already reviewed their side; I can forward the full chat transcript for context. What I need now is a clean, provable fix inside Magento and on the server so every new order triggers a confirmation email without fail. Acceptance criteria • Order placemen...

...email confirmation are both fine, so choose whichever combination gets us approved fastest. • Configure production-ready sending limits and the correct sending pool to sustain the 50 k-per-day volume without throttling. • Build the required IAM policies, SMTP credentials and verified identities, then walk me through where to store them safely. • Set up the SMTP endpoint and show me sample cURL / Postfix / Node or PHP snippets so I can trigger campaigns directly through the SES SMTP API. • Apply essential deliverability best practices: SPF, DKIM, DMARC, feedback loops, dedicated IP (if needed), and relevant sending rate adjustments. I don’t need integrations beyond AWS SES itself—once the SMTP endpoint is live and tested, I’ll plug it into my...

We will create a new VM at KVM 6 portal to install Postfix and Dovecot for inbound and outbound emails. We will use SSL and spam security No programming needed.

Hello: I was trying to clone one email server for installation at a different VPS. I think you can help me better and much faster with low budget. You will create a new VPS by using our KVM 6 VM You can install Postfix alone or use webmin and we use postfix You will connect Dovecot with post fix and activate SSL You will confirm inbound and outbound mail delivery We will make sure spam box is working as well. (AI by Freelancer) What I expect from you • Install and configure Postfix for SMTP submission and relay with authentication • Install and configure Dovecot so users can retrieve mail via IMAP and/or POP3 (whichever you recommend for reliability) • Enable SSL/TLS throughout, ideally with an automatic Let’s Encrypt certificate &bu...

I run a Linux server on Hetzner with CyberPanel and need an...(no 550 errors, passes Google Postmaster tools). 4. Deploy Snappy webmail under its own sub-domain with valid SSL so users simply visit https://webmail.example.com. 5. Hand over a brief summary of changes plus any commands or panel paths so I can repeat the steps later. 6. I’m open to occasional future maintenance, so keep the configuration clean and document anything custom. CyberPanel, Postfix, Dovecot, Let’s Encrypt, and Hetzner’s DNS console are already in place; feel free to bring whatever tools—dig, nslookup, mail-tester, OpenSSL—you prefer. I consider the job complete when a test message lands in Gmail’s inbox without warning, Outlook syncs flawlessly, and webmail opens o...

I am looking to hire a cold email professional who already operates their OWN warmed sending infrastructure, including: Your own warmed domains Your own warmed IPv4s Your own SMTP/PMTA/MailWizz/Postfix servers Your own rotation system (domains + IPs) Your own deliverability setup (DKIM, SPF, DMARC, rDNS, etc.) I am NOT looking for someone who uses Instantly, Smartlead, Mailgun, SendGrid, AWS SES, or any cloud ESP. I am ONLY interested in professionals with a private, fully warmed system that is ready to send immediately. Requirements: Must send from your warmed domains (not mine) Must use your warmed dedicated IPs (not shared SMTP junk) Must have a working sending system already ready Ability to send 50,000 cold emails per day (5 days a week) 1 million per month Strong i...

...PDF / JSON Auto GST filing (optional, owner-controlled) E-WAY BILL Manual-assist mode (default) Official API support (optional) Generate / cancel / track CHEQUE PRINTING CTS-2010 compliant Multi-bank templates Alignment settings Cheque issue log MOBILE INTEGRATION Upload invoice photos from mobile via local Wi-Fi Attach images to invoices FINANCIAL / ACADEMIC YEAR FY-wise data separation Prefix/postfix change on FY change FY change confirmation 5-day grace period before FY lock Auto-lock after grace Quotations editable across FYs Hidden emergency override for locked FY (owner only, fully audited) BACKUP & RESTORE Auto backup (configurable interval) Maintain last 3 verified backups Delete old backup only after verification Automatic email backup Restore preview before applying...

I have a FreeBSD 14.3 VPS and I’m ready to carve it into three Bastille jails, each sitting on its own public IPv4 address. )Two of those jails will run PowerDNS, the third will host Postfix. I will install that myself.) All three must be able to speak to one another and to the FreeBSD host itself because the databases they rely on will live on the host. Here’s the outcome I expect: • Bastille correctly installed and configured on the VPS. • Three jails created and started, each bound to its assigned public IP and reachable from the internet as well as from the host and sibling jails. • Internal networking (loopback pair, bridge, or other clean method) so jail-to-jail and jail-to-host traffic never leaves the box. • Any PF or ipfw rules, sysct...

I need help resolving an issue with Postfix on my Linux server. Currently, emails are not being delivered. Ideal Skills and Experience: - Strong experience with Postfix - Familiarity with Linux server management - Knowledge of mail logs and DNS records - Troubleshooting skills for email delivery issues

...frontend starter Backend structure Agent (panel ↔ server) concept Draft installation scripts Full technical PDF Your mission is to complete, stabilize, and secure the panel. Target systems Ubuntu 20.04 / 22.04 AlmaLinux 8 / 9 VPS & Dedicated servers Main features Server monitoring & service control (Nginx, PHP-FPM, MariaDB, Docker) Multi-domain & multi-user hosting DNS (BIND) & Email (Postfix / Dovecot) Let’s Encrypt SSL (automatic) Firewall & Fail2ban Secure Agent Token system Root panel + client panel Modern cPanel-like interface Deliverables Fully working hosting panel Secure install scripts (Ubuntu & AlmaLinux) Clean source code (ZIP) Basic documentation (English) Important rules no chatgpt No external branding or ...

I have a FreeBSD 14.3 VPS and I’m ready to carve it into three Bastille jails, each sitting on its own public IPv4 address. )Two of those jails will run PowerDNS, the third will host Postfix. I will install that myself.) All three must be able to speak to one another and to the FreeBSD host itself because the databases they rely on will live on the host. Here’s the outcome I expect: • Bastille correctly installed and configured on the VPS. • Three jails created and started, each bound to its assigned public IP and reachable from the internet as well as from the host and sibling jails. • Internal networking (loopback pair, bridge, or other clean method) so jail-to-jail and jail-to-host traffic never leaves the box. • Any PF or ipfw rules, sysct...

...existing WordPress website (including database) from another host/server. This is a practical, execution-focused task. The selected freelancer will be required to work directly on our systems, including access to: VPS (Linux) cPanel DNS / Domain settings Other relevant company resources required to complete the task Scope of Work 1. SMTP / Mail Server Setup Install and configure SMTP server on VPS (Postfix / Exim or equivalent) Configure hostname & reverse DNS Setup SPF, DKIM, DMARC Ensure proper email deliverability (avoid spam) Secure configuration (no open relay) Test successful email sending & receiving Enable email account creation 2. WordPress Migration Transfer WordPress website from existing host/server to VPS Migrate complete database and files Ensure site run...

I am looking to hire a cold email professional who already operates their OWN warmed sending infrastructure, including: Your own warmed domains Your own warmed IPv4s Your own SMTP/PMTA/MailWizz/Postfix servers Your own rotation system (domains + IPs) Your own deliverability setup (DKIM, SPF, DMARC, rDNS, etc.) I am NOT looking for someone who uses Instantly, Smartlead, Mailgun, SendGrid, AWS SES, or any cloud ESP. I am ONLY interested in professionals with a private, fully warmed system that is ready to send immediately. Requirements: Must send from your warmed domains (not mine) Must use your warmed dedicated IPs (not shared SMTP junk) Must have a working sending system already ready Ability to send 50,000 cold emails per day (5 days a week) 1 million per month Strong i...

I am looking to hire a cold email professional who already operates their OWN warmed sending infrastructure, including: Your own warmed domains Your own warmed IPv4s Your own SMTP/PMTA/MailWizz/Postfix servers Your own rotation system (domains + IPs) Your own deliverability setup (DKIM, SPF, DMARC, rDNS, etc.) I am NOT looking for someone who uses Instantly, Smartlead, Mailgun, SendGrid, AWS SES, or any cloud ESP. I am ONLY interested in professionals with a private, fully warmed system that is ready to send immediately. Requirements: Must send from your warmed domains (not mine) Must use your warmed dedicated IPs (not shared SMTP junk) Must have a working sending system already ready Ability to send 50,000 cold emails per day (5 days a week) 1 million per month Strong i...

I need a properly configured SMTP server that can handle up to 10,000 outgoing messages per day for bulk-email campaigns. At this stage I’m not tying it to Mailchimp, a CRM, or any other platform—I simpl...recommend for a sender of this size. Deliverables • Fully operational SMTP service reachable over standard ports • Authenticated sending domain with SPF, DKIM and DMARC in place • Test report confirming inbox delivery with no major blacklists triggered • Quick setup guide or screencast so I can change passwords, add users and monitor logs on my own If you have past experience deploying Postfix, Exim, PowerMTA or similar for low-to-medium volume senders, that’s exactly what I’m after. Please outline the stack you’d use and...

...preserved (LDAP/MMR involved) NG modules, LDS licensing (v3 license) Tasks may include: Review migration approach (9 → 10 Daffodil) LDAP / domain / hostname validation Zimbra proxy & services troubleshooting License (LDS) validation and migration checks Mail flow (Postfix, DNS, DKIM/SPF/DMARC) Answering specific technical questions during migration Required experience: Strong hands-on experience with Zimbra 8.8 / 9 / 10 LDAP / MMR knowledge Understanding of NG modules and LDS (Zimbra 10 licensing) Linux (Ubuntu / RHEL / Oracle Linux) Postfix & mail routing Nice to have: Proven experience with Zimbra migrations Experience with Zimbra Daffodil (10.1.x) Consulting / troubleshooting background Engagement: Short-term / hourly Initially 3–5 hours (may exte...

Gmail keeps bouncing my messages with the dreaded “550-5.7.26 This mail is unauthenticated” notice. I send through a Postfix server and manage all DNS zones inside DigitalOcean’s control panel. I already know the problem: my domain lacks working SPF and DKIM records. I need an expert who can generate the correct tokens, publish them in DigitalOcean DNS, and tie everything back into Postfix so Gmail finally recognises the messages as authenticated. Scope of work • Create or repair one SPF record that aligns with my current sending path. • Generate a DKIM key pair, add the TXT record in DigitalOcean, and wire it up to Postfix (OpenDKIM or equivalent). • Verify both records with common testing tools (Google Postmaster, dig, etc.)...

My production mail server runs on Debian and every main layer—Postfix, Zimbra and the Kernel—now needs to move to the latest stable releases. All three components must come through the process with complete data integrity, so the job starts with a solid backup plan: at the moment no backup exists and I will rely on you to design, create and test one before any package is touched. Once the safety net is in place, the work continues with a carefully staged upgrade. Postfix, Zimbra and the Kernel should be brought up to date, followed by migration to the current Debian stable. I expect minimal downtime, full preservation of mailboxes, calendars, contacts, aliases and logs, and a short verification window after each major step to catch issues early. The assignment i...

I’m looking for someone who can physically come to our New Delhi office—remote work is not an option—to take charge of an u...configuration, and handle a full upgrade-and-migration cycle to new hardware without disrupting mail flow. You’ll be expected to arrive on-site, review the existing Ubuntu environment, adjust any misconfigurations, migrate data and user accounts cleanly, then validate that everything functions exactly as before—or better—once the cut-over is done. Solid knowledge of Ubuntu server administration, Postfix/Dovecot, DNS, SSL/TLS and mail security best practices will be essential to get this wrapped up quickly. If you’re available to start immediately in New Delhi and can demonstrate hands-on experience with Mobodoa at t...

...notification emails every day. I want to keep costs down without sacrificing inbox placement, so the solution must include solid spam filtering, real-time email tracking with usable analytics dashboards, and the ability to trigger automated responses such as application-received or interview-scheduled messages. I’m open to cloud services (Amazon SES, Mailgun, SendGrid, etc.) or a self-hosted stack (Postfix, Exim, Mailcow, or similar). What matters is that the final setup: • Sends >10k emails daily with stable throughput and high deliverability • Provides built-in or easily integrated tracking & analytics for opens, clicks, and bounces • Supports basic autoresponder logic for common job-site events • Filters out spam to protect domain reput...

..."Enterprise" editions. It must be the Community/Open-Source edition only. Scope of Work & Technical Requirements: 1. Infrastructure & OS: o Deploy on on-premises Linux infrastructure (e.g., Ubuntu LTS). o Optimize OS kernel and file systems for high I/O performance (2000+ concurrent users). 2. Software Stack (Strict FOSS Policy): o Must use a fully open-source stack (e.g., Mailcow, SOGo, or a custom Postfix/Dovecot stack). 3. Outlook Compatibility (The Critical Requirement): o Must implement Open Source ActiveSync (e.g., via SOGo, Z-Push, or Grommunio Community) to ensure two-way sync. o Outlook: Users must be able to use Outlook (Desktop) to sync Email, Calendar, and Contacts without purchasing third-party plugins. 4. Webmail & Collaboration: o Deploy a mod...

I have an Ubuntu-based VPS that I want to turn into a reliable mail-sending host using Postfix. The instance is fresh; nothing has been installed yet, so you’ll be starting from a clean slate. The only protocol I need exposed is SMTP—no IMAP or POP3 boxes to manage—just rock-solid outbound and relay capability. Alongside the core Postfix install, I want every standard security measure baked in: TLS certificates for encrypted transport, proper SPF and DKIM records generated and tested for my domain, plus concise firewall rules that leave only the required ports open. Deliverables • Postfix installed and sending test messages successfully over SMTP • Valid SSL/TLS configuration (Let’s Encrypt is fine) • SPF and DKIM records ...

...Overview We are looking for a skilled Penetration Tester with specialized expertise in email server security to conduct thorough assessments of our email infrastructure. The ideal candidate will identify vulnerabilities in SMTP, IMAP, POP3 servers, and associated email security mechanisms. Key Responsibilities • Conduct comprehensive penetration testing on email servers (SMTP, IMAP, POP3, Exchange, Postfix, Sendmail) • Test email authentication mechanisms including SPF, DKIM, DMARC, and DANE implementations • Identify and exploit vulnerabilities such as open relays, SMTP injection, user enumeration attacks • Assess email encryption implementations (TLS/SSL, S/MIME, PGP) • Perform phishing simulation and social engineering tests targeting email users &bull...

My Webmin / Virtualmin mail server was running smoothly until I had to reinstall Postfix. Since then, messages are bounced or never show up because the two core services are tripping over file-system restrictions: • Dovecot is throwing file and folder permission errors whenever it tries to reach users’ maildirs. • Postfix will no longer accept incoming mail, clearly a permission-related failure. I need a clean overhaul of user, group and directory rights so that both services can coexist again without rejecting or losing mail. The job is finished when: 1. Dovecot reads and writes every mailbox without permission warnings in the logs. 2. Postfix reliably receives external messages and hands them off to Dovecot. 3. Test messages in and out comple...

...jobs, and performance optimization. Multi-user system with custom roles and permissions, fully isolating users’ contacts, lists, campaigns, and reports. Per-user sending quotas/credits with daily/monthly/total limits, auto-throttling when limits are reached. Assignment of individual SMTP settings per user, supporting multiple SMTPs while maintaining deliverability. Complete SMTP server setup (Postfix/PMTA) with Dovecot IMAP and optional Roundcube webmail; email headers show only sender domain and sending IP. DNS configuration including SPF, DKIM, DMARC, MX, reverse DNS, and deliverability monitoring; bounce/complaint handling included. Testing of sending, quotas, SMTP, DNS, and deliverability; validation that no server hostname or internal IP appears in email headers....

...email infrastructure engineer to design and configure a high-deliverability outbound email system for our SaaS platform. The project involves setting up a Dallas-based Postal + Postfix architecture using Ubuntu 24.04, MariaDB, Nginx, and dedicated IPv4 pools. You will configure Postal Inbound (API only), Postfix routing with provider-based IP pools (Microsoft, Google, Other), and Postal Outbound for SMTP delivery. Optimizing deliverability, SPF/DKIM/DMARC, PTR records, warmup schedules, and IP reputation management is essential. You must have hands-on experience with high-volume transactional email, multi-IP Postfix configurations, Microsoft 365 deliverability, DNS authentication, SMTP routing logic, queue management, and Linux server hardening. Familiarity with Doc...

Hiring an experienced professional to install MailWizz or Acelle, configure SMTP integration, and deliver strong, reliable email deliverability. Requirements: - Install & configure MailWizz or Acelle - Set up SMTP (Postfix, Exim, or PowerMTA) - Configure SPF, DKIM, DMARC, rDNS - Integrate SMTP with mailing app and perform delivery tests - Optimize inbox placement and overall sending performance - Strong expertise in SMTP/MTA configuration, DNS authentication, and deliverability management Engagement: One-time setup with potential for ongoing support on emergent issues, with quick response and efficient resolution.

Hiring a skilled professional to install MailWizz or Acelle, configure SMTP (Postfix / Exim / PMTA), implement SPF, DKIM, DMARC, rDNS, and deliver a fully optimized, high-deliverability sending environment. One-time setup with the option for ongoing support.

Hiring: Senior Systems Engineer — Build ISP-Level Email Filtering Prototype (Postfix, rspamd, Vault, AEAD) Remote • Contract (4–6 weeks) • Equity available We are building the first working prototype of , an ISP-level scam/spam/malware prevention system that moves message filtering away from user devices and into the provider network. A patent is filed, and now we need an expert engineer to assemble the prototype using commercial off-the-shelf components. What You Will Build A fully operational ISP-style email pipeline demonstrating: SMTP ingress (Postfix or Exim) Filtering (rspamd + ClamAV) Malicious quarantine inside ISP AEAD envelope encryption (AES-GCM or ChaCha20-Poly1305) Session key wrapping using Hashicorp Vault Provider-signed provenan...

...login/tenant for our long-term Microsoft 365 use. • Stand up Microsoft Teams in that tenant, including all required backend settings. • Create the first batch of user accounts (about a dozen) and verify their access. • Configure baseline Teams policies and permissions—messaging, meetings, and external access—so we have a secure, functional starting point. We currently run our own Linux Postfix server for our corporate email domain (). We will need to migrate users from that server to 365. I’m expecting this to be a short engagement—like a $150 starter package—so efficiency is key. If you know the admin portals, PowerShell shortcuts, and the typical pitfalls of multi-subscription environments, let’s connect and knock this ...