The online help says that the mailing list filter looks for a
X-BeenThere header to do its magic. How universal is this header? Is it
appropriate to complain about its absence on lists that lack it?
The header is pretty common on mailing lists, but not mandatory. Actually, Evolution doesn't depend on X-BeenThere exclusively for mailing list filtering. The list of headers that it uses to guess the mailing list names is defined through regexps in /cvs/evolution/camel/camel-mime-filter.c:
- Sender:
- Return-Path:
- X-BeenThere:
- Delivered-To:
- X-Mailing-List:
- X-Loop:
- List-Id:
- List-Post:
- Mailing-List:
- Originator:
- X-List:
