[pfx] Re: postfix does not use the MX of the parent domain

On 2023-11-21 17:11:49 +0100, Gerald Galster via Postfix-users wrote: > See Simple Mail Transfer Protocol (SMTP), RFC 5321: > https://datatracker.ietf.org/doc/html/rfc5321#section-5 > > "The lookup first attempts to locate an MX record associated with the >name. If a CNAME record is found,

[pfx] postfix does not use the MX of the parent domain

When sending a mail to some @helpdesk.inria.fr address, postfix tries to connect to helpdesk.inria.fr (which does not have a MX): Nov 21 15:43:26 joooj postfix/smtp[748304]: D1A104A9: to=<[...]@helpdesk.inria.fr>, relay=none, delay=76462, delays=76431/0.1/30/0, dsn=4.4.1, status=deferred