Hello there Rsoto99

The use of pop or imap? Wich of these two are you currently using?

Greetings

Hello there

Keep an eye on the part that syncs. The imap server is also described as a much Preffered and deterrminning topic when there is a conflict over it s settings. When the server says clear it when it s reading it happens.

Try moving e-mails to a local map. That s the only place that the server do not visit.

Greetings

Are you finding them in the Spam folder? Or the Trash folder?

Hi,

I have this issue as well.

I am using just one @outlook.com IMAP account which is set-up never to delete any emails. I am using Thunderbird (ver# 115.1.1 (64-bit))

I am a new user of Thunderbird, just started using this month. I faced this issue last week. I removed the outlook account and added it back on Fri or Sat.

Today on Tue, I am again facing this issue.

If I move the emails getting auto-deleted (unexpectedly) to another folder, then they do not get auto-deleted again. however, restoring / moving the email back to inbox gets the email auto-deleted almost instantly.

If I restore the email using Outlook.com web client or using Thunderbird the email in question appears back in the Trash folder almost instantly. If I close Thunderbird client and then restore the email using outlook.com webclient, then the email doesn't re-appear in the trash. However, the moment I launch Thunderbird client, the email(s) in question again appears in the Trash folder.

This is really unacceptable behaviour. I really wonder how people have been using Thunderbird when it doesnt even retain emails reliably!

Workaround: I Archived the email in question. Then moved the email from Archive back to Inbox.