Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

More than one subject appears in the same thread but both subjects have similar lists of senders.

  • 2 replies
  • 1 has this problem
  • 2 views
  • Last reply by dannas

more options

The question says it all. When one group of people starts chiming in on two subjects, all the responses appear in a single thread. How do I get Thunderbird to thread by subject only?

The question says it all. When one group of people starts chiming in on two subjects, all the responses appear in a single thread. How do I get Thunderbird to thread by subject only?

Chosen solution

Set the pref mail.strict_threading to false via Config Editor. https://support.mozilla.org/en-US/kb/config-editor

Read this answer in context 👍 0

All Replies (2)

more options

Chosen Solution

Set the pref mail.strict_threading to false via Config Editor. https://support.mozilla.org/en-US/kb/config-editor

more options

Followed instructions and found the file with preferences. Changed the mail.strict threading to false, restarted Thunderbird but the threading is unchanged.