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, the resulting name is processed as > if it were the initial name. If a non-existent domain error is > returned, this situation MUST be reported as an error. If a > temporary error is returned, the message MUST be queued and retried > later (see Section 4.5.4.1). If an empty list of MXs is returned, > the address is treated as if it was associated with an implicit MX > RR, with a preference of 0, pointing to that host."
This is also what I thought. > $ host -t mx helpdesk.inria.fr > helpdesk.inria.fr is an alias for prod-symfonyu20-app.inria.fr. > > $ host -t mx prod-symfonyu20-app.inria.fr > prod-symfonyu20-app.inria.fr has no MX record > > $ host prod-symfonyu20-app.inria.fr > prod-symfonyu20-app.inria.fr has address 128.93.128.88 > > --> connect to 128.93.128.88 So, if I understand correctly, the admin at Inria is wrong. BTW, in the mean time, I could see on another machine that exim4 has the same behavior as postfix. -- Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon) _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
