...hopefully some useful VMware related stuff
Allow Plain Text Login for POP3 on Exchange 2007
You may receive the error:
ERR Command is not valid in this state
When trying to enter username / password credentials to a pop3 session.
This can be resolved by opening the Exchange Management Shell and running the following command:
Set-PopSettings -LoginType PlainTextLogin
Followed by restarting the Microsoft Exchange POP3 Service on the Exchange server.
You can test that this has worked firstly by running the command in the shell:
This will show the login type
Secondly test pop3 functionality using telnet as per the article here: