I am setting up Postman to use with my WordPress instance. I am receiving the following error message: 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
Here is a copy of the transaction log:
220 smtp5.relay.iad3a.emailsrvr.com ESMTP – VA Code Section 18.2-152.3:1 forbids use of this system for unsolicited bulk electronic mail (Spam)
250-AUTH PLAIN LOGIN
535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6
I can access this e-mail account in Thunderbird using the same server settings without issue. I can also successfully log in to the webmail portal using the same user credentials.
I have tried using all available SMTP settings found here: http://www.rackspace.com/apps/support/portal/1088. Always get an error of some kind.
Any idea how to resolve this in the WordPress install?
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