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.
This happens only some of the time - usually it behaves as I want it
to. The host being delivered to is also running postfix and under my
control. Nothing interesting is logged on that system; it looks like
any successful probe.
What can be going on? This is postfix 2.6.6 running on RedHat EL 6.
Configuration options related to address verification:
unverified_recipient_reject_code = 550
unverified_recipient_reject_reason = Not deliverable
address_verify_map = btree:$data_directory/verify_cache
--
Fredrik Sandström
f...@abo.fi
