I am experiencing some very annoying behaviour. Several times a day and sometimes for up to an hour or so, K9 gives an authentication error for one of my three IMAP accounts that it is checking. I change nothing and, after a while, the issue goes away. Being unsure whether I am getting new mail alerts is a pain though. The other two IMAP accounts don't have this problem and I am also able to access the problematic account from the same device using other apps with the same login details. Can anyone suggest how to troubleshoot this?
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