Knowledge Base

Checking SMTP Server Authentication support

How to find out if your SMTP server supports basic SMTP auth login

As of version 2.0 ActivMail supports SMTP AUTH LOGIN authentication. This method encodes user names and passwords with Base64 encoding.

To determine if your mail server is setup to accept the AUTH LOGIN command start a telnet session to your mail server on port 25. Open up a new terminal (this is done on windows by running cmd.exe from Start -> Run). Now type:

telnet your.smtp.server 25

The server will output a welcome line, and wait for your commands, next type:

HELO your.computer.address

The server should respond with a greeting. Now type:

AUTH LOGIN

If auth login is not enabled the server may output something like this:

504 5.7.4 Unrecognized authentication type

If auth login is allowed the server may output something like this:

334 VXNlcm5hbWU6

As long as the line starts with the 334 code auth login should be supported. If you still have problems make sure that your user name and password are correct.

 

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