Old Joomla sites are causing me a lot of headaches.
We have denied direct emails from websites to internet but that just means that thousands of (SPAM) emails get stuck in the www server's mail que's because the sites are leaking like a sieve.
netstat -tapn example..
tcp 0 1 10.10.103.117:45233 22.214.171.124:25 SYN_SENT 7976/smtp
tcp 0 1 10.10.103.117:46636 126.96.36.199:25 SYN_SENT 6564/smtp
tcp 0 1 10.10.103.117:43322 188.8.131.52:25 SYN_SENT 6584/smtp
tcp 0 1 10.10.103.117:38889 184.108.40.206:25 SYN_SENT 8026/smtp
tcp 0 1 10.10.103.117:51595 220.127.116.11:25 SYN_SENT 6580/smtp
Now since /smtp can not connect to out of the server without username and password these get stuck in the que.
Currently the que is only for 1 day but soon we are forced to lower that to just a few hours.
I was wondering if you have figured out a way to "limit" how many emails a "site" can send per/hour or maybe disable email entirely from some sites.
Our WWW servers have Postfix installed but it is only allowed to send email not receive any external mail.
(PS. If you know how to disable all those useless Postfix delivery error messages let me know