Quick Tip: IPv6 Support on POP3 and IMAP (Dovecot)

[apinto]

  
Quick Tip: IPv6 Support on POP3 and IMAP (Dovecot)

Requirements
Make sure you have the following:

• IPv6 capable server.
  
• IPv6 DNS (AAA) entry for your mail server.
  
• Root Access.
  
• Working Install of Sentora with POP3 and IMAP enabled via Dovecot.
  

Enabling IPv6 Support
Edit the /etc/sentora/config/dovecot2/dovecot.conf file.

Right in the start of the file you need to edit the listen = * to listen = *, ::

Code:

##
## Dovecot config file
##
listen = *, ::

After the change you need to restart dovecot, just issue the restart command: sudo service dovecot restart


The Issue
When adding an POP3 account to Gmail it was always giving "connection refused" error, no more details.
After a few hours of messing around logs, configs, permissions and other things (for your information this issues provides NO LOGS because Gmail connects via IPv6 and dovecot was not listening to :: (IPv6 wildcard).

Doing this solves the Gmail POP3 issue and allows further clients to connect via IPv6

[Cantalupo]

Very goody!
Thanks!