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

Posted on May 19, 2011 by SoCRaT

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

About SoCRaT

Cybersecurity Master's Student, Systems Engineer, OSS & Linux Geek
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3 Responses to POP3 Error: “ERR Command is not valid in this state” when connecting to Exchange 2010

  1. Toby Roberts says:
    July 25, 2012 at 11:54 pm

    thanks for that. solved my problem.

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  2. Opcom says:
    June 24, 2014 at 2:09 pm

    Great, thank you

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    Reply
  3. Derek D says:
    June 19, 2022 at 5:02 pm

    Thanks for writing thiss

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    Reply

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