Perl, CGI Coder Needed

Dear Every Best Coder. I have an email marketing script who sends emails to my customers. The Script Use Codeigniter Framework and Mysql for Database and running some files with Perl and using CGI. What i need exactly that to fix some Bugs and add some new features. So first error is i use a perl script to send emails... and when i send a small text/html in body everything work perfectly, but if i put a big text/html and send it wont send the email. we feel like the reason of this is from system limit because when the size of text/html more than 1.7Mb it won't let you send but if less than 1.7Mb it send normally. we tried to increase ARG_MAX but error still exist. maybe error should be fixed from other side of server. However if you read this carefull and you feel you can apply for this job please do if you don't know what im talking about and want to waste our time please do not apply.