On Mon, Jul 31, 2023 at 6:23 PM Florin Pasăre <fpas...@gmail.com> wrote:
> Hello, > I've been having some issues lately. We are using Mailman 2.1.15. > I've looked over the FAQ but the only thing that I could find is to contact > the ISPs and ask to be whitelisted - am I understanding this correctly? > Here is a brief description of the issue: > > Our server hosts 5 listserv, the biggest one counts over 530 subscribed > members from 55 different countries. > > > > We had received sporadic bounces triggered by emails sent to these lists > since the install of the server in 2016, but in the last months the number > of bounces we get has increased. We receive these bounce notifications > informing us that the given *subscription has been disabled* due to > *excessive > or fatal bounces *(up to around 30 bounce notifications triggered by a > single email sent to one of the listservs). Every time we get such > notifications, we untick the bounce under “nomail [reason]" in the admin > management site for each of the email addresses that haven been disabled by > the system. > > > > Furthermore, it has happened several times in the past few months that a > number of email addresses have been automatically removed from the > listservs (at the same time, from different countries). We have not found > an explanation for why this happens or a solution, so the only thing we are > able to do is to manually add them back to the listservs. > > > > We have also asked these colleagues for which we have received bounces to > check whether there is anything blocking the listservs’ emails from their > side (note that many of them work in ministries or agencies with strong > security features), and to add the server IP to the white list, but the > problem persists. > > > Thank you for your time, > > > Florin Pasăre, > In summary: 1. Your MTA logs probably have clues - with the reasons for the bounce(s). I'd love to see what the recipient servers think. 2. You have not mentioned if you DKIM-sign the list emails and have DMARC mitigation. 3. Do you have SPF records published? 4. Do you have stats on the bounces? -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254 7 3200 0004/+254 7 2274 3223 "Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-) [How to ask smart questions: http://www.catb.org/~esr/faqs/smart-questions.html] ------------------------------------------------------ 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/ Member address: arch...@jab.org
