The IMAP server replied to the 'FETCH' command with a 'BAD' response: Error in IMAP command UID FETCH: Invalid uidset (0.001 + 0.000 secs)

[sla-te]

With rambler.ru my logs are full with this error:
[error] UID command error: BAD [b'Error in IMAP command UID FETCH: Invalid uidset (0.001 + 0.000 secs).']
I believe it might be the same as in this issue, but it would require me too much time to work into this and I lack understanding of how IMAP works in order to make a solid PR for it.

jstedfast/MailKit#572

[jwiebels]

I also ran into this issue while running the following code:

with Imbox(hostname=host,
		    username=email_address,
		    password=password,
		    port=port,
		    ssl=True,
		    ssl_context=None,
		    starttls=False) as imbox:

    for folder in folders:
	    all_mails_with_matching_subject = imbox.messages(folder=folder, subject=subject)

While searching Google for a solution, I ran into this bug report on another package, and the reply to this issue suggests that the issue was resolved by using unsigned ints instead signed ints.

Hope this is helpful.

Best regards