SuiteCRM and Softaculous apps denied email access to server
Using SuiteCRM we can not longer connect to our server with ports 143 or 993. We can only connect with port 25. Trying with the other ports give an error message the email address is invalid and can't connect. (getaddrinfo failed: Name or service not known) We know the email address is valid- it is in everyday use. However the two ports are needed to send email campaigns. This started 2 months ago and the data center is of zero help. Also using Softaculous to install also gives us the same error message saying the email address is invalid and can't connect. Any insights will be greatly appreciated.
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Hey there! This doesn't sound like it would be related to cPanel, but is most likely related to a firewall configuration on the server, or an external firewall if you have one of those configured.
This should be simple enough to test - you just need to try connecting to those ports from an external system. A simple telnet test would show this:
telnet x.x.x.x 143
where "x.x.x.x" is your server's IP address. If that doesn't work, on a cPanel server that would indicate a firewall problem as both of those ports listen on localhost and all IPs with the dovecot service by default:
# netstat -lpn | grep -E '143|993'
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 2374291/dovecot
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 2374291/dovecot
tcp6 0 0 :::143 :::* LISTEN 2374291/dovecot
tcp6 0 0 :::993 :::* LISTEN 2374291/dovecot0
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