thank you. seems to be that if address_verify_negative_refresh_time = 30m, the next attempt to reach a specific recipient that is negative in cache, will still get the "old" answer from cache if it is not expired by address_verify_negative_expire_time. that is default 3d. so in my case, postfix was doing a new verify, but reported the old results from cache.
I was expecting that postfix would always do a new probe and not just handing out old results even though it lears right after this, new results. Am Fr., 25. Jan. 2019 um 16:33 Uhr schrieb Wietse Venema < wie...@porcupine.org>: > Stefan Bauer: > > Jan 25 15:31:14 mx2 postfix/smtpd[10117]: NOQUEUE: reject: RCPT from > > opsmail.colo.comodo.com[91.209.196.133]: 550 5.1.1 > > <webmas...@domain.tld: Recipient address rejected: undeliverable > > address: host IP[IP] said: 550 5.1.1 <webmas...@domain.tld: Recipient > > address rejected: User unknown in virtual mailbox table (in reply to > > RCPT TO command); from=<no_reply_supp...@trust-provider.com> > > to=<webmas...@domain.tld proto=ESMTP > > helo=<mcmail3.mcr.colo.comodo.net> > > Jan 25 15:31:14 mx2 postfix/smtp[10124]: 2CFE27E3A2: > > to=<webmas...@domain.tld, relay=IP[IP]:25, delay=0.25, > > delays=0/0.01/0.21/0.03, dsn=2.1.5, status=deliverable (250 2.1.5 Ok) > > The second logfile record shows that a new probe was sent with queue > ID 2CFE27E3A2 (the old result had expired, or it was older than > half the expiration time), and the probe result was 'deliverable'. > > If the old result was expired, then it would be a surprise that the > expired result was returned to smtpd. Normally, an expired result > is supposed to be ignored, as if the result did not exist. > > If the result was older than half the expiration time but not > expired, then it would be OK to return the old probe result to > smtpd. > > > I dont see a veify request at 15:31 at the remote site. why is postfix > > still caching verify results but report instead after client was > > rejected, that the address is deliverable? > > The probe had queue ID 2CFE27E3A2. Look in your mail logfile. > > Wietse >
