[Mailman-Users] maximum hop count exceeded

Grant Taylor gtaylor at riverviewtech.net
Wed May 26 05:41:48 CEST 2010

Stephen J. Turnbull wrote:
> Detect is one thing, fix is another.

Um, unless I'm mistaken, Mailman will not accept a message in to a 
mailing list if the header exists and has the list in question listed in 
said header.

In other words, that's Mailman's loop detection to make sure that a 
subscribed email address does not get re-routed in to the mailing list, 
forming a nasty loop.

So, I think this does "fix" this problem.

> Certainly it makes sense to cut out all but one of the "received" 
> headers for the list host, though, since you'll have MTA logs to trace 
> that.

Well, unless the mail logs include all the contents of the Received: 
headers, not everything would be logged.

Sure, the system that the message was (directly) received from would be 
logged, but none of the earlier Received: headers.

I've never had a need to do so, but I have considered (and thought about 
how to do so) a pre-Mailman archive on the server that includes the full 
headers as they would go in to Mailman (or formail that would remove 

Grant. . . .

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