SMTP authentication failure 504 5.7.4 Unrecognized authentication type

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Status: Published
Version: 1.0
Authors: HTL
Applies to: Supportworks ESP


SMTP Authentication Failure 504 5.7.4 Unrecognized Authentication type

Normally upgrading to Supportworks ESP 7.6.2 is a smooth process but should you find that you are unable to send emails out, and check the SwInternetMC log and it says: 


  504 5.7.4 Unrecognized authentication type

  Failed to login using LOGIN method

  Failed to connect to SMTP server

This error comes about if the Supportworks is unable to connect to the SMTP server because for some reason Login using a username and password is disabled. Check that the Exchange server has LOGIN enabled. Thereafter, go to Supportworks server configuration > system mailboxes > double click helpdesk mailbox > services > SMTP connector and ensure there is a username and password. If these two options do not work contact your Exchange Administrator.

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