Comcast silently blocked port 25 and caused an enormous amount of damage to my business as we had no clue why our mailservers stopped working.
They should be sued and really inform customers if they silently block ports.
anyway.
Could anyone tell me how to configure the zentyal firewall to redirect all smtp connections destined for port 25 to e.g. port 587.
Meaning: redirect all outgoing mail configured by postfix or sendmail to be connecting to remote mailserver:25 to mailserver:587
I know it is easy and the firewall config is really veryu nicely done, but I still find the redirects confusing.
Thanks