What is alert 8155?


A user has attempted to logon to GMS using the POP3 protocol command APOP but failed. The remote client specified the wrong password digest. The failure could be for several reasons:

  • The user did not provide the right details;
  • No such user does exist and this is an attempt to gain control of your system; or
  • The authentication source was not available

In this case, session Undefined was processing a connection from a client at Undefined. The user claimed to be Undefined@Undefined and could not log on because their account did not exist. The client sent the command


and GMS rejected it with

-ERR User unknown

To resolve this problem you will need to check that the user has entered their details correctly.

See Also:

Keywords:failed logon POP3 APOP 8155

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