On Tue, 2 May 2017, Rupert Gallagher wrote:
> [...]
> Is it possible to instruct Dovecot to use the public IP only?
for inet_listeners (imap, pop, etc.) you can use "address = <your-public-IP>"
the default is AFAIK to listen on all addresses ("*" for ip4 and "::" for
ip6)