[Mailman-Users] Is it my server or Yahoo's server(s)?
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 5 seconds! Is anyone else seeing this sort of problem? -- 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/
[Mailman-Users] Re: Is it my server or Yahoo's server(s)?
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 5 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 The highway is for gamblers, San Francisco Bay Area, Californiabetter 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/
[Mailman-Users] Re: Is it my server or Yahoo's server(s)?
At Sat, 29 May 2021 18:20:20 -0700 Mark Sapiro 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 5 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/
[Mailman-Users] Re: Is it my server or Yahoo's server(s)?
On 5/29/21 6:34 PM, Robert Heller wrote: At Sat, 29 May 2021 18:20:20 -0700 Mark Sapiro 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.> 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) So they apparently don't like the fact that you are sending a message to 75+ recipients at the same time. If you aren't already doing this, I suggest setting VERP_DELIVERY_INTERVAL = 1 in mm_cfg.py, or if you don't want that, set SMTP_MAX_RCPTS = 5. The former will send one message per recipient with a VERPed envelope sender for better bounce recognition. The latter will send no more than 5 recipients per message. If the issue is lots of recipients to one message, these will help -- Mark Sapiro The highway is for gamblers, San Francisco Bay Area, Californiabetter 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/
[Mailman-Users] Is it my server or Yahoo's server(s)?
Robert Heller writes: > Is anyone else seeing this sort of problem? Yes, it's not just you and Mark. There have been several threads on this recently, naming one or more of Verizon, Yahoo!, or AOL as the problematic destination, all of which are under one management now. The combined entity is just not very good at this. This [TSS04] Messages from temporarily deferred due to unexpected volume or user complaints - 4.16.55.1 is just bad faith or symptomatic of extreme incompetence. "Unexpected volume" and "user complaints" are very different issues. Steve -- 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/
[Mailman-Users] Re: Is it my server or Yahoo's server(s)?
On 5/29/2021 11:15 PM, Stephen J. Turnbull wrote: Robert Heller writes: > Is anyone else seeing this sort of problem? Yes, it's not just you and Mark. There have been several threads on this recently, naming one or more of Verizon, Yahoo!, or AOL as the problematic destination, all of which are under one management now. The combined entity is just not very good at this. This [TSS04] Messages from temporarily deferred due to unexpected volume or user complaints - 4.16.55.1 is just bad faith or symptomatic of extreme incompetence. "Unexpected volume" and "user complaints" are very different issues. Steve When I started in IT in 1966, computer memory was expensive and limited, so messages had to be short. But these days there is NO EXCUSE for an error message to say, "Either A or B occurred". Produce an error message with the appropriate error code; the program that produces the message must know which of the two cases occurred. If the error message has options, then the support personnel who have to respond to the message have to do additional debugging to determine the exact cause of the error message. --Barry Finkel -- 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/
