On 5/29/21 5:52 PM, Robert Heller wrote: > I run a *small* Mailman 2.x server on a VPS running CentOS 7, with Postfix. I > have one E-Mail list with just under 500 members, about 60 of which have > @yahoo.com addresses and another 15-20 with @aol.com addresses. For the past > couple of weeks, Yahoo's servers have been "deferring" mail from my servers. > It is not clear why. I have all of the DMARC, DKIM, and SPF stuff setup in > Mailman (From: munging) and Postfix (DKIM signing, SPF records, etc.). I did > some statistical analysis of Postfix's logs for just today. Sending mail to > *every other* E-mail service is averaging a delay of under 3 seconds. Sending > to Yahoo's servers is averaging a delay of just under 50000 seconds! > > Is anyone else seeing this sort of problem?
Yahoo is throttling mail from your server. I see this sometimes as well. The 4xx status returns to your MTA should have more detail as to why. Have you looked at these in your MTA logs. The only ones I see recently from yahoo are like ... dsn=4.0.0, status=deferred (host mta7.am0.yahoodns.net[98.136.96.75] said: 450 User is receiving mail too quickly tnmpmscs (in reply to RCPT TO command)) but I think I've seen other reasons in the past. -- Mark Sapiro <m...@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan ------------------------------------------------------ Mailman-Users mailing list -- mailman-users@python.org To unsubscribe send an email to mailman-users-le...@python.org https://mail.python.org/mailman3/lists/mailman-users.python.org/ Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: https://www.mail-archive.com/mailman-users@python.org/ https://mail.python.org/archives/list/mailman-users@python.org/
