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 (connect to helpdesk.inria.fr[128.93.128.88]:25: Connection timed out) Some admin at Inria tells me that this is incorrect and that postfix should connect to the MX of the parent domain (inria.fr) in such a case. Note that I haven't changed anything concerning the choice of the next hop of outgoing mail (no relayhost). This is a Debian 12 (bookworm) machine. Is this issue specific to Debian? FYI: joooj:~> dig -t mx helpdesk.inria.fr ; <<>> DiG 9.18.19-1~deb12u1-Debian <<>> -t mx helpdesk.inria.fr ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4551 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;helpdesk.inria.fr. IN MX ;; ANSWER SECTION: helpdesk.inria.fr. 2260 IN CNAME prod-symfonyu20-app.inria.fr. ;; AUTHORITY SECTION: inria.fr. 644 IN SOA dns.inria.fr. hostmaster.inria.fr. 2023112008 7200 1800 3600000 900 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP) ;; WHEN: Tue Nov 21 15:53:12 CET 2023 ;; MSG SIZE rcvd: 131 joooj:~> dig -t mx prod-symfonyu20-app.inria.fr ; <<>> DiG 9.18.19-1~deb12u1-Debian <<>> -t mx prod-symfonyu20-app.inria.fr ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30346 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;prod-symfonyu20-app.inria.fr. IN MX ;; AUTHORITY SECTION: inria.fr. 586 IN SOA dns.inria.fr. hostmaster.inria.fr. 2023112008 7200 1800 3600000 900 ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP) ;; WHEN: Tue Nov 21 15:54:10 CET 2023 ;; MSG SIZE rcvd: 108 joooj:~> dig -t mx inria.fr ; <<>> DiG 9.18.19-1~deb12u1-Debian <<>> -t mx inria.fr ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33064 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ;; QUESTION SECTION: ;inria.fr. IN MX ;; ANSWER SECTION: inria.fr. 1951 IN MX 10 mail3-smtp-sop.national.inria.fr. inria.fr. 1951 IN MX 10 mail2-smtp-roc.national.inria.fr. ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP) ;; WHEN: Tue Nov 21 15:58:03 CET 2023 ;; MSG SIZE rcvd: 108 -- Vincent Lefèvre <vinc...@vinc17.net> - 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 -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
