Thunderbird/Support/Troubleshooting Checklist

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Revision as of 20:37, 26 August 2025 by Rolandtb (talk | contribs) (web experiment add-ons aren't so pesky :-) apparently)
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Checklist in wikmedia format for this wiki and for SUMO

Checklist in markdown

  • 1. Try [Thunderbird Troubleshoot Mode](https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbirdThunderbird)
  • 2. Try disabling all 3rd party software including anti-virus, firewall etc
  • 3. if 1. and 2. don't work, try removing all add-ons because web experiment add-ons can be pesky :-)
  • 4. copy/paste TB troubleshooting information (Thunderbird app menu `☰` -> `Help` -> `Troubleshooting information`) into your SUMO question (or bugzilla bug but if you haven't done this checklist you should probably be asking the question on SUMO before filing a bug)
  • 5 If 4. doesn't help, and you are somewhat technical and have some time, then try getting Thunderbird logs. See https://wiki.mozilla.org/MailNews:Logging

How to get Thunderbird logs in Windows:

You can open a command prompt (not powershell) and use the following:

set MOZ_LOG=timestamp,IMAP:5 set MOZ_LOG_FILE=output.txt "C:\Program Files\Thunderbird Daily\thunderbird.exe" -no-remote -profile "C:\Users\<USER>\AppData\Roaming\Thunderbird\Profiles\<PROFILE>"

There is more detail here: https://wiki.mozilla.org/MailNews:Logging?_gl=1*1v8k5z8*_ga*MTI5ODQ1ODk5OS4xNzE1NjA1NTQz*_ga_2VC139B3XV*czE3NTMyMTM4Mzgkbzc0JGcwJHQxNzUzMjE0MjY3JGo2MCRsMCRoMA..#Gecko_Logging