Fredrik Sandstr?m:
[ Charset ISO-8859-1 converted... ]
> What's up with this? The result of the probe is "deliverable", but
> postfix rejects the message with a 450 code.
>
> Oct 13 11:12:52 smtp5 postfix/smtpd[5261]: connect from
> mail-vk0-f43.google.com[209.85.213.43]
> Oct 13 11:12:52 smtp5 postfix/cleanup[5012]: AC5E08029F:
> message-id=<20151013081252.ac5e080...@smtp5.xxx.yy>
> Oct 13 11:12:52 smtp5 postfix/qmgr[3428]: AC5E08029F:
> from=<double-bou...@xxx.yy>, size=251, nrcpt=1 (queue active)
> Oct 13 11:12:52 smtp5 postfix/smtpd[5261]: NOQUEUE: reject: RCPT from
> mail-vk0-f43.google.com[209.85.213.43]: 450 4.1.1 <lindr...@xxx.yy>:
> Recipient address rejected: unverified address: Not deliverable;
> from=<withh...@aaa.bb> to=<lindr...@xxx.yy> proto=ESMTP
> helo=<mail-vk0-f43.google.com>
> Oct 13 11:12:52 smtp5 postfix/smtpd[5261]: too many errors after RCPT
> from mail-vk0-f43.google.com[209.85.213.43]
> Oct 13 11:12:52 smtp5 postfix/smtpd[5261]: disconnect from
> mail-vk0-f43.google.com[209.85.213.43]
> Oct 13 11:12:52 smtp5 postfix/smtp[5047]: AC5E08029F:
> to=<lindr...@xxx.yy>, relay=hsmtp1.xxx.yy[aaa.bbb.ccc.ddd],
> delay=0.01, delays=0/0/0/0, dsn=2.1.5, status=deliverable (250 2.1.5 Ok)
> Oct 13 11:12:52 smtp5 postfix/qmgr[3428]: AC5E08029F: removed
>
> When the client retries, the address is in the verify cache, and
> delivery succeeds.
The following Postfix default settings may be relevant (with Postfix
before 3.0 they look a little different but have the same effect).
address_verify_poll_count = ${stress?{1}:{3}}
smtpd_hard_error_limit = ${stress?{1}:{20}}
You are either running Postfix under stress mode, or you have
manually set the above parameters to their minimum in main.cf,
causing the SMTP server to hang up after the first "error" and
causing it not to wait for verify probes to complete.
Do not ignore "STRESS" warnings in the mailoog file.
Wietse
