Hi, The use case: I send a message to a mailing list of which I am a member. I can see via another imap client (in this case MailMate / OS X) that there are two messages in imap, both with the same messageid. One example right now (printing the Subject header below): in my sent mail folder: [Physics@Veldhoven] Inschrijving/Registration Physics@Veldhoven 2019 deadline 9 November 2019 and in my inbox: [pdp] [Physics@Veldhoven] Inschrijving/Registration Physics@Veldhoven 2019: deadline 9 November 2019 However, in notmuch-emacs, I only see the first one. My guess is that notmuch has first seen the one in "sent", indexed that, and then seeing the second one with the same messageId, skips it. I'd prefer to have both, but if I have to pick one or the other, I'd actually prefer to have the second one, as I'd then have [ pdp ] as the start of the subject header for ALL mails to that list, and as an added bonus, afew (should?) then tag them with the list name making them easily searchable. So how does one do this "right"? Thanks, JT _______________________________________________ notmuch mailing list notmuch@notmuchmail.org https://notmuchmail.org/mailman/listinfo/notmuch