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antoniokingFlag for United Kingdom of Great Britain and Northern Ireland

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telnet pop3 user 'err protocol error'

I am seeing the following error after succesfully connecting on Port 110 to our exchange server using TELNET and typing in USER journal
"ERR protocol error"

The users username is "journal"
If I try other usernames it works fine... what could be the issue?
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Hi, turned out simply restarting the pop3 service resolved my issue.