u/naylandsmith

I have an IMAP account with 37 GB (about 20000 inbox and 7500 sent) on thunderbird last ESR version shared between 3 computers.

Some days ago it has become extremely slow on all computers. Emails appear in the list, but when I try to open them, the screen stays blank for several minutes until it finally opens. Also, while sending, it takes a long time to copy the message to the Sent folder.

The activity manager shows it is 'bringing up to date' the Inbox, Sent, and Archive folders. It seems to finish after several hours, but whenever I close Thunderbird and reopen it, the process starts all over again.

What I did so far:

• I create archive folders by year for old emails in order to have less mails in folders
• Under gmail settings, tags, I hide on IMAP gmail default tags (starred, important, scheduled)
• I even create a new profile

What can I do? Anyone else has this problem?