15 messages in net.sourceforge.lists.courier-usersRe: [courier-users] Weird messages re...| From | Sent On | Attachments |
|---|---|---|
| M Core | Oct 18, 2007 11:13 pm | |
| Gordan Bobic | Oct 19, 2007 12:56 am | |
| Leigh S. Jones, KR6X | Oct 19, 2007 6:01 am | |
| Alessandro Vesely | Oct 19, 2007 7:28 am | |
| M Core | Oct 19, 2007 8:07 am | |
| Gordan Bobic | Oct 19, 2007 8:24 am | |
| Marcin 'Rambo' Roguski | Oct 19, 2007 8:29 am | |
| Gordan Bobic | Oct 19, 2007 8:36 am | |
| Johnny C. Lam | Oct 19, 2007 9:26 am | |
| Alessandro Vesely | Oct 19, 2007 10:28 am | |
| Alessandro Vesely | Oct 19, 2007 11:14 am | |
| M Core | Oct 19, 2007 1:11 pm | |
| Johnny C. Lam | Oct 19, 2007 1:34 pm | |
| Gordon Messmer | Oct 19, 2007 4:18 pm | |
| Gordon Messmer | Oct 19, 2007 4:21 pm |
| Subject: | Re: [courier-users] Weird messages received | |
|---|---|---|
| From: | Alessandro Vesely (ves...@tana.it) | |
| Date: | Oct 19, 2007 10:28:45 am | |
| List: | net.sourceforge.lists.courier-users | |
Johnny C. Lam wrote:
Gordan Bobic wrote:
It would also be worth checking if "MAIL FROM:" is the same as "From:" and "RCPT TO:" is the same as "To:". Can anyone think of why these would ever be inconsistent in a valid email?
The first argument to "MAIL FROM:" is the mailbox where errors and DSNs are sent. This is different from the "From:" header, which should be the mailbox of the author of the message and also the default "reply-to" address. These two can easily not match when address extensions and mailing lists are involved.
To recap, mailing lists and robots. IME, messages from non-occasional mailing list and several robots sooner or later are stored in their own imap folder(s). In case doing so is common, there is an interesting point to consider: it is very easy to discriminate between vanilla human-to-human messages on the one hand and robots and occasional mailing lists on the other.
Comparing that with the overwhelming intricacies involved in the spam vs. ham discrimination, I'd say the former is cleaner than the latter. It also clarifies the meaning of SPF.