At Sat, 29 May 2021 18:20:20 -0700 Mark Sapiro <m...@msapiro.net> wrote:
> > 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. I'm getting this message: 421 4.7.0 [TSS04] Messages from 108.161.142.143 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.verizonmedia.com/error-codes (in reply to MAIL FROM command) > -- Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services hel...@deepsoft.com -- Webhosting Services ------------------------------------------------------ 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/
