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

multiple NSTMP files in a subfolder of IMAPMAIL of TBird 115 (Gmail) in Windows 11

  • 3 replies
  • 0 have this problem
  • 7 views
  • Last reply by Wayne Mery

more options

I have multiple nstmp files in a subfolder of IMAPMAIL of TBird 115 using GMail in Windows 115. The files range in size from 170 to 335 megs. Do I need to keep them all, or can some be deleted? On a weekly basis, I do move mails I want to archive from the server to Local Folders and compact the various folders, as well as regularly deleting mail I don't need from the IMAP Inbox. I keep mail in the IMAP Inbox that I need to be able to access from anywhere. It looks like the size of the NSTMP files seems to follow the historical size of the IMAP Inbox. Thanks!

I have multiple nstmp files in a subfolder of IMAPMAIL of TBird 115 using GMail in Windows 115. The files range in size from 170 to 335 megs. Do I need to keep them all, or can some be deleted? On a weekly basis, I do move mails I want to archive from the server to Local Folders and compact the various folders, as well as regularly deleting mail I don't need from the IMAP Inbox. I keep mail in the IMAP Inbox that I need to be able to access from anywhere. It looks like the size of the NSTMP files seems to follow the historical size of the IMAP Inbox. Thanks!

All Replies (3)

more options

fundamentally the files are the result of failed attempts to compact your mail folders. You probably need to create an exception in your antivirus product for the Thunderbird profile so the antivirus does not mess up the compact. Essentially having an antivirus meddling in the propfile folder while the program is moving large numbers of emails is a disaster waiting to happen.

So no you don't need those files.

more options

Compact is being rewritten for version 128. If you continue to see problems in version 128 which comes out this summer, please be sure to post a new support item.

more options

Were you able to remove all the nstmp files?