I-Thunderbird Isithangami Sokwesekwa

Hello Community Please help me to start again with Firefox from scratch. Last Month I downloaded Thunderbird email app and set up with a new email account using mailfence. Now I find that my mailfence email address was only a free trial and I have to pay to continue to use. I now wish to set up with my original free email with gmail. I did uninstall the Thunderbird app and then installed from fresh. Unfortunately it still has the mailfence email remembered in the Thunderbird App. How so I start again from scratch using my gmail account instead of the mailfence account that has now expired? Thank you in anticipation of you help.

I had emptied my spam and junk folders but unfortunately I had marked up one email address as such which I need to undue, but I can't find where the list is. Where do I find it please?

I had a huge problem with M Outlook. In addition it has locked me out of my Office 365 package and I'm not getting help or support. Luckily I had backup completed before the problem. I changed to Thunderbird (using pop3), which I find very good. The back up is approx 8 GB but with many duplicates which I need to clean up. When I click import it seems to limit the file size to 2 GB. How can I import this backup file into Thunderbird to enable me to access the emails, clean up the many many duplicates and reduce the size? I await help, Thanks in advance

bij het importeren van adressen is het misgelopen. Er waren een 90 tal adressen en na de bewerking vermeldt het systeem een 2700 adressen. de teksten waren niet leesbaar: alle letters dooreen. Die kan ik nu niet verwijderen