On Fri, 2014-04-18 at 03:51 +0900, Stephen J. Turnbull wrote: > Lindsay Haisley writes: > > > Mailman to change the From: address to a VERP-like address with the > > author's address encapsulated within an address @ the list server. > > Any mail received by the list server for this address would have > > its address parsed by Mailman and be redirected to the original > > author's real email address. Would this pass RFC compliance? > > Technically, it probably does. The problem is that Mailman doesn't > handle those mails, the MTA does. It would be reasonably easy to set > up a filter and have the MTA pass the message to that filter.
We already do this for listname-subscribe, listname-owner, listname-bounces, etc. The addition of another similar name extension should be no problem. > It's very ugly, though, especially if for some reason you have no > display name to work with. Agreed! But the display name is free form and strictly informational. Could this not be the subscriber name of the author, if it's part of the subscription record? > A bigger problem, as stated what you've done is to set up an open > relay. So you would need to either maintain a database of valid > addresses forever, or do some crypto trickery so that only valid > addresses would be forwarded. The latter would involve key > management, etc. This is a good point, so the encapsulated address would have to be obfuscated in some way. Crypto wouldn't be difficult. I've already hacked AES encryption/decryption into Mailman for generating a Resent-Message-ID: header containing the recipient address. I have a single key in mm_cfg.py and as long as it stays the same then addresses will translate. But I see your point. This is putting RFC compliance out an a very long and thin thread. If you change the key, your entire archive of emails becomes theoretically non-compliant, and this is indeed ugly. > N.B. I read a very similar suggestion somewhere, probably in the DMARC > Internet-Draft or in their FAQ. -- Lindsay Haisley | "Everything works if you let it" FMP Computer Services | 512-259-1190 | --- The Roadie http://www.fmp.com | ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org
