Does imapsync set INTERNALDATE correctly? I ask because naive IMAP uploading doesn't do this. (It's the date Gmail shows in the mailbox.)
Yup. Just used it last week to migrate my IMAP account to a new box. Used it years ago for a similar migration. Always works great.
This saved me at least 2 hours of awful fetchmail/getmail related work last month; Highly recommended.
fetchmail or getmail? I once used a very-slightly customized version of getmail (the Charles Cazabon program) in production to sync customers' GMail accounts into Salesforce.com, and it worked great (continues to work great, AFAIK).
The problem I have with ThunderBird is how poor it is an
writing text only emails.
What is the difference between the GitHub version and the paid version on the website?