Re: Fixed Message-ID trouble

Subject: Re: Fixed Message-ID trouble

Date: Mon, 25 Sep 2023 23:53:34 +0200

To: Teemu Likonen,


From: Gregor Zattler

Hi Teemu, notmuch users,
* Teemu Likonen <> [2023-09-25; 11:54 +03]:
> Some person on debian-user mailing list seems to be sending messages
> with fixed Message-ID field: the same ID in different messages. In
> Notmuch it is creating trouble because it connects unrelated threads to
> one. The person has different messages in different threads but Notmuch
> thinks they are the same message because the Message-ID is the same.
> This is potentially a "denial of service" for Notmuch. Well, not quite,
> but is harmful nonetheless. How would a Notmuch user fix the mess or
> protect himself against it?

would you please give details of some such posts?  Then
other people are able to investigate.

Ciao; Gregor
notmuch mailing list --
To unsubscribe send an email to