Hi,

using Exim as MTA. Some of the NDRs to the -bounce address are coming in without Message-Id headers and Exim doesn't add one. When the bounce gets pushed via LMTP it gets spat out because of the lack of a Message-Id header and due to the Null return envelope Exim freezes the message. Has anyone seen this before and is there something that Mailman should be doing differently or should I configure Exim to generate a Message-Id before pushing via LMTP?

Thanks. Andrew.