
On Dec 26, 2016, at 2:25 PM, Francesco Ariis
wrote: I wouldn't delete the footer, especially the unsub information. Some users are new to mailing lists and how they work; I frequently witness frustration and misunderstandings over how to unsubscribe.
Sure, but it is a trade-off. DMARC imposes a penalty on adding a footer, the DKIM signature breaks, and p=reject kicks in, unless we start mangling the From lines, which is IMHO worse, but opinions vary... On the postfix-users list, majordomo (not mailman) is configured to detect various attempts at (un)sub and blocks the post, responding to the user instead with helpful directions. False positives happen rarely, but as the list is email related, not never, and one has to rephrase some posts to get around the filter. -- Viktor.