Blocking all IPs & Using PHP mail()

[carson]

I run a MyBB forum, and MyBB utilizes PHP mail() for account activation e-mail addresses. In my csf.deny, I have 0.0.0.0/0 denied. This is to prevent all incoming requests directly to the server. The website is only accessible by going to the domain. The issue with this, is that it makes PHP's mail() function a little finicky. Is there a way with CSF to block all incoming requests, but allow all out going requests? Or, what would be a better way to go about this?

[carson]

I was able to resolve this by adding the following to my csf.allow

Code: Select all

icmp|out|d=25,465,587|s=0.0.0.0/0 # Allow all outgoing connections on ports 25, 465, and 587