PHP mail() timeout

Question

First a few infos:

• Debian Squeeze
• PHP 5.3.3
• PHP with mod_cgi
• I absolutely HAVE to use mail() in this case. For all my other

Answer 1

Is it possible that you have a firewall blocking outgoing SMTP connections? Are there other things on that server that can successfully send email?

I would make this a comment, but am not allowed to yet.