Thunderbird running on Linux Mint 19.3 works perfectly for downloading EMails. However, the process of sending Email messages slow, despite the fact I have a very fast and reliable Internet connection.i lg3c
Recommend that when I hit the send option the outgoing message is immediately moved to the outbox and sent in the background. This would enable users to promptly move to other messages. Presently it takes about thirty seconds at least before a message actually goes out.