Error code 25 ESMTP Authentication protocol error When trying to send email from MailSite Express a code 25 ESMTP Authentication protocol error is received.

You need to verify that you have the SMTPRA service responding on port 25. It is likely that if you are receiving the above error then you may have another service for example the post.office MTA responding on port 25.

Please verify which service is answering on port 25 by the following command:

        telnet maildomain.com 25

Also you should verify that within the expresscfg.asp file the SMTP and IMAP IP addresses are correct. This file can be found within the MailSite\Express\Web\ directory.

Further if you have selected the option from within the MailSite console to disable SMTP authentication then you will need to modify the expresscfg.asp file. Item 7.7 should be changed to FALSE.