Hello there James mccoy

It’s bad to hear that duplicates are ruling that program.

Using filters Spamassassin does slow it ,try to use the intern filter , that learns from you. You can send these outlook pictures to thunderbird and use them.

Using thunderbirds templates Why use outlook templates , use the thunderbird templates in stead of the old fashioned from outlook.

Removing the duplicates By clicking on the issue map and choose for repair map often cleans the duplicates to. Or try other ways that to clean the add ons or extensions. There are more ways to succeed.

Dealing with ghostmaps Go to the profile map and clean it all.

Sorry, but I may have said it wrong about "templates". What I should have said is how to import stationary into Thunderbird? I have a lot of stationary from days of Outlook Express.

Hi James,

I use only server-side spam filters. One advantage, which you probably know, is that all a person's e-mail clients (e.g., on different computers and devices) benefit from a central spam filter, so a person does not have to manage filters in every client. If you use Thunderbird's filter, remember that you must train it with both spam and non-spam messages.

https://support.mozilla.org/en-US/kb/thunderbird-and-junk-spam-messages

I do not know about RSS duplicates. There are add-ons that remove duplicate messages. Maybe they work on RSS feeds too.

I have not imported templates from Outlook. Two methods might/should work:

• If your Outlook installation is local, Tools (menu) - Import. You wrote that earlier versions of Thunderbird imported Outlook templates. Did you mean to imply that current versions do not?
• Export Outlook templates as eml files or in an mbox file, then import them into Thunderbird. Both file types can be imported by the add-on ImportExportToolsNG. Mbox files can also be imported just by moving them into the profile.