4 ms·
No mandated format for message-ID. If you are proxying an existing store with a stable message-ID, you can just use that. My partially written gmail proxy use
by brongondwana 12y ago
No mandated format for message-ID. If you are proxying an existing store with a stable message-ID, you can just use that. My partially written gmail proxy uses the MSGID from Gmail, for example.
SHA1 was a good balance between speed and unforgability at the time. There's still no known collision, and I'm working on putting a piece of randomness into the LMTP headers that are added to every message on delivery into Cyrus to make it even safer.