Have you got any Anti-Virus or malware program running that is allowed to scan thunderbird files and folders or outgoing mail ?

What Anti-Virus are you using?

How frequently does Thunderbird auto save to Drafts folder? Thunderbird > Preferences > Composition > 'General' tab Auto save every X? minutes

Right click on 'Drafts' folder and select 'Compact' to remove all traces of old deleted emails to reduce file size and cleanup file.

Hi Toad,

Thanks for responding.

• I'm not running any antivirus or malware programs • Autosave is every 60 minutes

In System Prefs>Advanced>Network & Disk Space, I've had "Compact all folders when it will save over 1MB in total" checked. I've assumed that was an automatic thing.

However, as you suggested, I manually Compacted the Drafts folder (as well as my inbox,) and now things are running much more smoothly. I don't know if there's a connection.

I neglected to mention initially that this slowness wasn't a problem until I upgraded to the current TB version. Before that I was running an ancient version of TB and there were no problems along these lines.

I'll try compacting folders manually if the problem recurs.

Thanks, Don H