GMS has reported an error because the remote POP3 client has issued a USER command with a syntax error.
In this case, session Undefined was processing a command from Undefined. The command
was rejected with
-ERR No space in command
To resolve this problem you will need to tell your user to upgrade to the latest version of their mail client or ask them to use GMS Webmail to get access to their email.
Keywords:syntax space USER POP3 rejected 8145