Skip to main content

Filter by topic and date

Filter by topic and date

IETF mailing lists delivery issues resolved

21 May 2024

During a period from May 6 to May 9, a number of messages intended for IETF, IRTF, IAB, IESG, and RFC-Editor email lists were accepted by email services, but not forwarded to the list members or the list archives. All identified messages have now been processed by the intended mailing lists for delivery to current list subscribers, and they will appear in list archives.

These non-delivery issues occurred as the mailing list systems were migrated from Mailman 2 to Mailman 3, which is now complete. The re-injected messages are unmodified, will contain their original <Date> header, and will appear at that date and time in that header in the archives. Of course, the related transport headers for the messages delivered to list members will reflect the time of re-injection.

The IETF Mailarchives remain a reliable record of messages actually distributed to lists. 

We believe this concludes work on delivery issues related to the Mailman 3 migration.

As previously noted, all existing lists and list subscriptions have carried forward. List subscribers and owners for email lists at,, and will be redirected to the new, intuitive Mailman 3 web interface, Postorius. There is a step at first login where a subscriber will have to prove the ability to receive mail at the address being logged in with, and the subscriber will establish a new password. 

Once a subscriber has created a user at, that same login information will be used for,,and

Further questions or discussion should be directed to the mailing list.

Update: 2024-05-21 2200 UTC

Share this page