Heho, Running on OpenBSD7.3. I am currently facing an issue that OpenSMTPd disables a route for a dual-stack MX if a connection to the v4 address fails, without retrying v6.
The system has a local v4 network, but no routes; A v6 default route is set and the system is reachable via IPv6. smtpd.conf is fully default (it is internal mail-sending for monitoring purposes, so the remote is rather 'friendly'). Other hosts with a similar configuration (but no v4 except lo) do not show the same behavior. Any ideas what i might have missed? With best regards, Tobias -- Dr.-Ing. Tobias Fiebig M tob...@fiebig.nl