On Nov 29, 2021, at 5:31 AM, Stephen J. Turnbull <stephenjturnb...@gmail.com<mailto:stephenjturnb...@gmail.com>> wrote:
Jayson Smith writes: Good point about DMARC. Does anyone know if Charter suddenly started caring about some DMARC policies on or around this past Friday? I for one don't know. You'd have to ask their postmaster, or get the subscriber to do so, to be sure. I think it's as likely that they got an update to their filters from a vendor. That could be sensitive to DMARC from alignment, or it could be something else. I have my list set to munge the From: lines of messages from senders E.G. AOL, Yahoo, etc. that publish a DMARC rejection policy. You could try setting up your list mail to participate in the ARC protocol.[1] I think most MTAs have options or plugins for this by now. Also Mailman 3 has an option to handle it itself, but it is preferable for the MTA to handle it as Mailman 3 can't validate SPF. On a slightly different topic, I've heard from a few Outlook users that list messages are consistently ending up in their junkmail folders. All of the big providers have this problem occasionally, although my impression that it's more of a problem with Microsoft than Google or Yahoo!. Again, ARC might help. Yes, this mailman list has suddenly started going into my junk folder. If you can get the problematic user to forward the entire message (forward as attachment) you can examine the headers for the source that sent it to junk mail; normally there are several. They will usualy have some simple-to-cryptic message in the headers that will say how it examined the message, what score it gave it and what score is required. There are also headers for DKIM status and SPF status. For example, I think this is the one from our Barracuda system (I think) : X-BESS-Spam-Status: SCORE=0.50 using account:ESS35309 scores of QUARANTINE_LEVEL=0.0 KILL_LEVEL=5.0 tests=BSF_SC0_SA085, BSF_SC0_SA085b, BSF_SC0_MISMATCH_TO Received-SPF: pass (mx-inbound46-171.us<http://mx-inbound46-171.us>-east-2c.ess.aws.cudaops.com: domain of mailman-users-bounces+johnson=pharmacy.arizona....@python.org<mailto:mailman-users-bounces+johnson=pharmacy.arizona....@python.org> designates 188.166.95.178 as permitted sender) X-BESS-Spam-Report: Code version 3.2, rules version 3.2.2.236178 [from cloudscan13- 165.us<http://165.us>-east-2a.ess.aws.cudaops.com] Rule breakdown below pts rule name description ---- ---------------------- -------------------------------- 0.10 BSF_SC0_SA085 META: Custom Rule SA085 0.40 BSF_SC0_SA085b META: Custom Rule SA085b 0.00 BSF_SC0_MISMATCH_TO META: Envelope rcpt doesn't match header X-BESS-Spam-Score: 0.50 X-BESS-BRTS-Status: 1 So this is the last step before O365, and in my case it’s %@$#*#& Microsoft O365, because we have a hybrid Exchange setup and our email is delivered through our Barracuda antispam servers, so the O365 anti-spam process is starved of spam, and apparently has quotas to meet or it’ll be fired, so it just false-positives a ton of messages, and sadly they’re mainly Mailman lists I NEED to keep up on, and their whitelisting process is, inexplicably, entirely based on the From: sender address. :-( X-Microsoft-Antispam-Mailbox-Delivery: ucf:0;jmr:0;auth:0;dest:J;OFR:SpamFilterAuthJ;ENG:(910001)(944506458)(944626604)(920097)(930097)(3100021);RF:JunkEmail; This has just started happening in the last few weeks, so I think they’ve turned on some stupid setting; my Exchange365 settings are to NOT send anything to my junk folder. I've had issues with other mailing lists, and in one we have to munge the ‘from’ addresses for all traffic not just the Yahoo ones :-/ Is this a user-enableable setting? -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs ------------------------------------------------------ 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/
