Markus Mohr wrote on Aug 15 about a mail loop undetected by Mailman while the looping messages included :

[..] X-Autoreply-From: <his mailaddress> [..] Precedence: bulk [..] X-BeenThere: <mailinglist address> [..]

Markus: "If I understood correctly each of this lines should have stopped mailman from resending his answer to the list!? It didn't though and so created a lot of unwanted mails. :( I couldn't find a trigger in the configuration to change this behaviour."

We had two similar mail loops last week on two of our Mailman 2.0.4 lists, both triggered by the same subscriber. The X-Autoreply-From header was absent though, but the Precedence and X-BeenThere headers appeared as reported by Markus.

Any insights, or a hint how to prevent more loops of this kind? Thanks!

Peter Bootsma