I have a product advertised and I am receiving around 2000+ inquiries in 1-3 days. Inquiries are delivered through the site where the product advertised, so not directly from an email address, therefore when I am replying most of my replies reaches the SPAM folder of the potential buyer. I want someone to help me deliver my message to my customers INBOX. Maybe an email campaign, SMTP, PHP Mailer, I don't know. Awaiting proposals.