Scenario :- Error while sending email using Squirrel Mail :-
Message not sent. Server replied:
Connection timed out
110 Can’t open SMTP stream
This problem usually occurs when CSF ( Config Server Firewall ) is installed on your server and it is interacting with the working of squirrel mail. So while configuring CSF enable both SMTP_BLOCK & SMTP_ALLOWLOCAL . Enabling just SMTP_BLOCK can cause this issue.
Tags: mail