vim /etc/dovecot/dovecot.conf — listen = *, :: ? listen = * — service dovecot restart

If you see this error after Dovecot 2.0.x was installed: Error: service(pop3-login): listen(::, 110) failed: Address family not supported by protocol Error: socket() failed: Address family not supported by protocol Error: service(pop3-login): listen(::, 995) failed: Address family not supported by […]