Tag Archives: pop3

POP3 Error: “ERR Command is not valid in this state” when connecting to Exchange 2010

In order to fix the problem, issue the following command at the Exchange shell, which allows Exchange POP to use plain text credentials: Set-PopSettings -LoginType PlainTextLogin Then restart the POP3 service, that’s it! Source: http://support.qualityunit.com/knowledgebase/supportcenter/troubleshooting/user-error-command-is-not-valid-in-this-state..html

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