Windows 10 bereikte EO (einde ondersteuning) op 14 oktober 2025. Als je Windows 10 gebruikt, lees dan dit artikel.

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Threading based on Message-ID's and not just Subject?

Zenos beantwoord
Henrik R.

Hi!

When I add something to the Subject:-line while replying to a message my reply + subsequent replies from the other party becomes a new thread. To me, this is an error, and it must be because Thunderbird fails to use the following headers:

References: In-Reply-To: X-Forwarded-Message-Id:

Is there an add-on, or maybe even a peculiar setting I haven't noticed, that solves this problem?

Best regards, Henrik R.

Hi! When I add something to the Subject:-line while replying to a message my reply + subsequent replies from the other party becomes a new thread. To me, this is an error, and it must be because Thunderbird fails to use the following headers: References: In-Reply-To: X-Forwarded-Message-Id: Is there an add-on, or maybe even a peculiar setting I haven't noticed, that solves this problem? Best regards, Henrik R.

Alle antwoorden (2)

Hero27 said

When I add something to the Subject:-line while replying to a message my reply + subsequent replies from the other party becomes a new thread. To me, this is an error, and it must be because Thunderbird fails to use the following headers: References: In-Reply-To: X-Forwarded-Message-Id: Is there an add-on, or maybe even a peculiar setting I haven't noticed, that solves this problem?

Strange! Now the problem seems to have solved itself!?

January 28, 2015: NOW the problem is there again!! Very strange...!!

Bewerkt door Henrik R. op

Anything here useful to you? I must confess that I have trouble seeing what the differences are between the "strict" and "correct" config options. :-S

Bewerkt door Zenos op