> On 16/10/2020 00:52 PGNet Dev <pgnet....@gmail.com> wrote: > > > On 10/15/20 2:02 PM, jeremy ardley wrote: > >> how/where do I configure (just) the dovecot smtp-client -> > >> submission_relay_host to only connect IPv4? > > > > It appears your host has A and AAAA records in your DNS. The clients will > > try IPV6 first if they see an AAAA record. > > > > If you don't need IPV6 for your host remove the AAAA record. All > > connections will then only use IPV4. > > > > If you need IPV6 for some other reason then create an alias DNS A record > > and point your clients to that instead > > That's not the issue. > > All my machines are dual stack. > All my hosts' DNS records exist for both A & AAAA records. > > Some services listen on only IPv4, some only on IPv6, some both. > > For Dovecot _listeners_ it's trivial to set IPv4/6-only, or both, addresses. > > It's also trivial to set OTHER clients, connecting TO Dovecot, to use > IPv4-only. > > I'm asking how/where to 'tell', via config, Dovecot's smtp-CLIENT, that's > making to connection to the submission_relay_host, to use _only_ IPv4.
There is currently no (other) way to do this than using /etc/hosts or specifying IPv4 address for the relay host. Aki
