Sendmail & PHP vs. Grey Listing
OS: Fedora Core 3
I have a webserver inwhich I send email out using PHP and (I believe) sendmail. I use the mail function in PHP. The function works fine when emailing to Gmail and Hotmail, but if I try to send an email to a server who uses grey listing the email never goes through. I'm figuring that I need to change a setting to tell my server to confirm delivery so that it will retry sending the message.
Things I've tried:
- I opened port 25 on my router and firewall
Other than that I'm not sure where else to start. Thanks for your advice.
-Mark.
|