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

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
Solved Arquivado

"not responding"

Jay M

When deleting more than one email, I get the "not responding" message and a delay. Then it resumes working but it takes so long to delete email.

When deleting more than one email, I get the "not responding" message and a delay. Then it resumes working but it takes so long to delete email.

All Replies (5)

Sorry to hear that. But, there's a couple things to try here. Let’s roll up our sleeves and hopefully fix this for you.

1. Try compacting folders

  • Go to your email account > right-click a folder like Inbox or Trash > Compact. This cleans up “deleted” space and can improve speed - especially if it's been some time since this action was performed.

2. What kind of email account is this?

  • If it’s an IMAP account (like Gmail, Yahoo, Proton via Bridge, etc.), Thunderbird has to sync the deletion with the server. If the server is slow or there's a lot of back-and-forth, then that slow communication can cause delays.

3. Are you using Proton Mail with Proton Bridge?

  • Proton Bridge can sometimes slow down when handling bulk actions like deleting multiple messages, especially if Proton's under heavy load

Chosen Solution

You could also just got to File -> Compact Folders and do all of them at once. But, where's the fun in that?

Did the above message help your issue?

NI not answered. Closing question as solved

I am having the same problem...sometimes (as in all too often) when I get notifications from my calendar, sometimes when I select an e-mail reply for view, I get the "Not Responding" message and must wait and wait for the program to resume working. Not sure if I have an add-on that is causing this or some other internal/local problem. Suggestions (Compacting Folders doesn't affect my problem) please.