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TestTrack SMTP Send Mail Error #503
Note: The following information only applies to TestTrack 2013.0.2 and earlier.
This article includes solutions for the following send mail error 503 problems:
The SMTP server returns a 5.5.2 Sender Already Specified or One Mail Per Message error.
Some SMTP servers allow only a single email to be sent per connection. The SMTP server thinks spam is being sent because TestTrack can send multiple emails during one SMTP connection.
Configure the TestTrack Server to only send one message per SMTP connection.
The SMTP server returns a "Bad Sequence" error.
The mail server expects to receive an extra set of commands before TestTrack initiates its Send Mail command. The extra command could be Username and Password authentication.
Enter a return email address that TestTrack can use when sending email notifications.
If the problem is not resolved, you may need to reconfigure your mail server to allow send mail requests from the TestTrack Server IP address. This maintains the SMTP authentication while allowing the TestTrack Server to send mail.