[pfx] Re: relaying a 550 yields a defer
Wietse Venema via Postfix-users <[email protected]>
| Newsgroups | gmane.mail.postfix.user |
|---|---|
| Message-ID | <[email protected]> |
Randy Bush via Postfix-users: > debian trixie, postfix 3.10.5-1~deb13u1 > > sender -> m0 -> psg.com > > m0 is relaying recipients in bogus.com to psg.com, but should drop > unknown users. psg.com is correctly 550ing an unknown user > > m0.rg.net:/home/randy> telnet psg.com 25 > Trying 2001:418:1::62... > Connected to psg.com. > Escape character is '^]'. > 220 psg.com ESMTP Exim 4.98.2 Thu, 09 Apr 2026 23:47:06 +0000 > EHLO m0.rg.net > 250-psg.com Hello m0.rg.net [2001:418:3807::22] > 250-SIZE 209715200 > 250-LIMITS MAILMAX=6 RCPTMAX=50000 > 250-8BITMIME > 250-PIPELINING > 250-PIPECONNECT > 250-STARTTLS > 250 HELP > MAIL FROM: [email protected] > 250 OK > RCPT TO: [email protected] > 550 unknown user That's what happens NOW. > but then postfix seems to be telling the sender to retry later 450. > > 2026-04-09T23:15:36.547760+00:00 m0 postfix/smtpd[4892]: NOQUEUE: reject: RCPT from mail-australiaeastazrln10220002.outbound.protection.outlook.com[52.103.200.2]: 450 4.1.1 <[email protected]>: Recipient address rejected: unverified address: delivery temporarily suspended: connect to psg.com[147.28.0.62]:25: Connection timed out; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<SY8PR01CU002.outbound.protection.outlook.com> That is a cached error that hasn't expired yet. Wietse _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]