Thunderbird is Working very well for many users.

When was the last time you compacted your folders?

This is support from Thunderbird. We do not give recommendations for other products. That is what Google search is for.

compact? why? and how?

I have now created a new folder and drag the mail I want to delete there. In that folder I _can not_ delete the mails I have just dragged there. So, no read/write permission error. No settings error. It's Mozilla error.

Most users that have numerous problems never do any normal maintenance to their files. Computers take more that just turning them on. https://support.mozilla.org/en-US/kb/compacting-folders http://kb.mozillazine.org/Keep_it_working_(Thunderbird)

POP is working OK for me. No problems deleting anything. TB 52.1.1, on both Windows 10 and MX Linux.

Firefox is fine here too. "firefox: unusable" - what does that mean?

If you are in the habit of opening your profile and deleting files at random then you should expect unusual problems.

If you really have discovered a problem, then so far we don't know how to reproduce it. Without that knowledge, no-one can start trying to work on the alleged fault.

Airmail zei

Most users that have numerous problems never do any normal maintenance to their files. Computers take more that just turning them on. https://support.mozilla.org/en-US/kb/compacting-folders http://kb.mozillazine.org/Keep_it_working_(Thunderbird)

Thank you for pointing me there; It seems to be the standard setting, so it is on.

Zenos zei

"firefox: unusable" - what does that mean?

Tried Silverlight lately? My tv-provider still uses it. Tried Garmin-plugin by any chance? Not working anymore. Playing flash maybe? Blocked by default. Facebook? Uses some plugin, not supported by firefox. Its probably all to make sure dumb people are protected, but if I need (for example) garmin communicator plugin, I should be able to turn it back on.

I changed nothing. I made no adjustments to my setup. All I got was an update. Now no matter what I try I can not delete any mail from my account.

I have a primary hotmail account ( pop-mail.outlook.com ). I can delete mails there. I have a secondary ziggo / upcmail / chello account (all the same company, the like to rename the company). pop3.upcmail.nl port 110: I (seem to) receive mail, but none of the delete options (delete in header of thunderbird, delete above actual email, right click -> delete) does what it is supposed to do. I have a third (private) mail account (pop.kerstdorpen.nl) and it deletes mail.

I can not give any more information? Its not deleting mail :(

Plugins are now not supported. If they are important to you then you may need to find another browser, or keep an old version of Firefox.

I don't understand Mozilla's choice in doing this. The good news is that Thunderbird is becoming independent of Mozilla. The bad news is that it relies on technology that Mozilla is going to abandon, and cannot be maintained by the new Thunderbird development team. So Thunderbird is likely to be rewritten and the danger is that in the short term it won't be "feature complete" compared with what it can do right now.

Two out of your three accounts still delete.

Does the non-working account have a proper Trash folder, with the appropriate icon? The Folder Flags add-on may be useful to allow you to set the particular attributes of whatever folder you want to use as a trash folder.

The solution: remove the account. Loose the mail. Create a new account with exactly the same credentials. And I can delete mail again. My hate against Mozilla has new food :( :(

Thank you Zenos for being honest.