Randomly can not contact IMAP servers?
Thunderbird fails to contact IMAP servers - randomly. The it deletes all of the local folders for that account. When it finally does connect, it has to re-download EVERYTHING - and while doing that, other IMAP logins fail, deleting all of the local folders for that account.
Of 3 yahoo accounts (all set up identically) it fails on just one.
When contacting hotmail's IMAP (2 accounts) it ping-pongs between the accounts that it will trash.
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https://support.mozilla.org/en-US/questions/1030194?esab=a&s=&r=0&as=s
Closing this thread. Please keep to a single thread per issue.