Hank van Cleef <[EMAIL PROTECTED]> wrote, in part, >The background scenario is that I have been experiencing the "now you >see it/now you don't" big-consumer-internet mail service spam >blocking. This week it is Verizon.net. > >Basically, mail to verizon.net addresses failed and bounced for a 24 >hour period on the 12th. Service appeared to have been restored on >the 13th. Again, yesterday (the 18th), Verizon quit receiving mail >again. The log message being shown by sendmail is of the the form: > >Jun 19 10:49:00 julie sendmail[16973]: [ID 801593 mail.info] >m5JGmxNk016971: to=<[EMAIL PROTECTED]>, >ctladdr=<[EMAIL PROTECTED]> (101/10), delay=00:00:00, >xdelay=00:00:00, mailer=esmtp, pri=121428, relay=relay.verizon.net. >[206.46.232.11], dsn=5.0.0, stat=Service unavailable > >For the four days June 13-17, mail went verizon.net normally, >dsn-2.0.0, stat=Sent > >Two Verizon users have contacted me and told me that they had received >no mail from our list since the 11th; that they had contacted Verizon >support, and had been told that Verizon was not blocking or dumping >our list mails. Both users are sufficiently knowledgeable to have >looked for shunting to a "spam" or "bulk" file. I wrote a private >e-mail to one user giving log details for him to use. That e-mail >bounced back sky high, and the bounce message made clear that Verizon >has a spam block on my IP. The log message was another dsn=5.0.0 >stat=Service unavailable.
It seems to me that stat=Service unavailable means that the inbound mailer is not available at the moment. This should result in a 400-level SMTP retryable reject, not a 500-level hard reject. The statement "Verizon was not blocking or dumping our list mails" is technically a correct statement; Verizon is not accepting mail. Another thought comes to mind - when this happens, is Verizon rejecting all mail, or is that mailer selectively not accepting mail? If Verizon is selectively rejecting mail, then I would expect a different message than dsn=5.0.0 stat=Service unavailable. ---------------------------------------------------------------------- Barry S. Finkel Computing and Information Systems Division Argonne National Laboratory Phone: +1 (630) 252-7277 9700 South Cass Avenue Facsimile:+1 (630) 252-4601 Building 222, Room D209 Internet: [EMAIL PROTECTED] Argonne, IL 60439-4828 IBMMAIL: I1004994 ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org http://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://www.python.org/cgi-bin/faqw-mm.py Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: http://mail.python.org/mailman/options/mailman-users/archive%40jab.org Security Policy: http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq01.027.htp