Unfortunately I've used POP3 to synchronize my mails from www.gmx.ch with Thunderbird Mozilla Firefox (incoming mails: pop.gmx.net port 995) and (outgoing mails: mail.gmx.net port 465). The box delete mails from Server after 14 days has been checked. Now almost all mails from the server has been deleted. Is it somehow possible to transfer the mails backwards to the GMX-Mail-Server?
I don't think if there could be any solution to this. IMAP account takes a copy of emails to the locations configured. However, POP accounts simply moves them permanently. Deletion is therefore permanent.
We are offered a limited space in our office. Exceeding that space leads us to a fine. We have therefore configured our accounts through POP. The mails download to our local servers. To avoid deletion and hardware crashes, we have backed them up to DropBox through Mail Backup X. That helps us in many ways.
Mail Backup X: http://www.mailbackupx.com/download.html
I think you can do this:
- Backup your e-mails in case you break something. Backup them outside Thunderbird.
- Add a new account to Thunderbird connected to your www.gmx.ch inbox with IMAP. This way you should now have 2 accounts in Thunderbird connected to your www.gmx.ch inbox: one with IMAP and one with POP3.
- Now change the password to the www.gmx.ch inbox POP3 account and put a wrong password. This way we will be safe and we will be assured that no e-mails will be downloaded again with POP3
- Now in Thunderbird drag & drop the e-mails from the POP3 inbox to the IMAP inbox and repeat the same action for each folder (spam, junk, deleted, sent, draft, etc...). You can also select all the e-mail, right click and move to the folder you want.