All traffic goes to a set of internal relays that handle the traffic, they have been pointed to them for some time. This all seemed to start several months ago, it seemed like overnight the traffic to the list server greatly increased and the mailman service that had been rock solid for years changed.
I did notice today that there was effectively no outbound traffic queued in mailman but the postfix queue delivering inbound to the service did have messages queued up almost like the handoff to the mailman service was not working. A quick reboot immediately cleared that up but the nature of the how the reboot happens has me thinking postfix may have some sort of issue. At time reboots can happen very quickly but I have seen during these times a queue build in the MTA reboots can seem to drag on. As a test a few times I have shutdown postfix first before the reboot and things return to a quick turnaround of the system, almost like postfix is delaying a clean system reboot. ________________________________ From: Stephen J. Turnbull <[email protected]> Sent: Thursday, October 15, 2026 8:23 AM To: Puchalski, Chris (USA) <[email protected]> Cc: [email protected] <[email protected]> Subject: [Mailman-Users] Re: Older Version of Mailman (2.1.12) Suddenly Very Slow in Delivery Puchalski, Chris via Mailman-Users writes: > So at least I stopped the bleed but I still do see some messages > taking significantly longer than others even to the same list. It > seemed to stall on the long messages every three or Puchalski, Chris via Mailman-Users writes: > So at least I stopped the bleed but I still do see some messages > taking significantly longer than others even to the same list. It > seemed to stall on the long messages every three or so but after > this change it would still stall but after a much larger amount of > messages. Check where the stalled messages are going. If they're going to one or more of a small set of hosts, the remote MTA(s) may be throttling you, or just overworked. (This is very easy to identify at RoadRunner for example: they just close the connection after about 3 messages from the same source. :-\) "SPAM Promotes Arbitrary Madness" in mail admins. :-( -- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://urldefense.us/v2/url?u=https-3A__www.siriusopensource.com_&d=DwICAg&c=MASr1KIcYm9UGIT-jfIzwQg1YBeAkaJoBtxV_4o83uQ&r=YSHnKgNEhiYTYiWfpKvuabk61iV6qMNGur1_1CS1mMM&m=37VvHmJIsN-F-560JkUAeUp2VT1kDEAH-ARUvix5rUpEagftjDS3WwcWFCLh3XHN&s=PhGsp5woS6iORrOmCJUiL0FuO11Md_2G_W0D45bwpVM&e= Software systems consulting in Europe, North America, and Japan ------------------------------------------------------ Mailman-Users mailing list -- [email protected] To unsubscribe send an email to [email protected] 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/[email protected]/ https://mail.python.org/archives/list/[email protected]/ Member address: [email protected]
