How to troubleshoot SMTP Authentication

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How to troubleshoot SMTP Authentication

If you’re doing desktop troubleshooting of end user mail clients and you want to make sure that a persons account is able to use SMTP Authentication properly, you to do this with a telnet client but it will take a little work.

If you do a google search for troubleshooting SMTP Authentication, you will find many guides that use telnet in combination with a base 64 encoder/decoder webpage or tool. Well, here at Vircom, we use a little tool that we wrote internally called Sconsole, short for SMTP Console. It was designed as a replacement for telnet and includes a base 64 encoding facility built into it; Instead of having to manually encode the Auth Login username & password using a base 64 encoder, Sconsole will do it for you.

Where can you grab it:

http://support.vircom.com/supteam/sconsole.zip

How do you use it?

Simple. Unzip the file and you’ll find a program called sconsole.exe. It’s a small .net application which should work on any windows machine with .net 2.X or better installed. Once you start it up, this is what you should get:

Type in the name of the HOST you want to connect to and the port (25 or 587).

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To do the auth login, click on the SMTP Tab.

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In the freeform box at the bottom, type in EHLO domain.com and hit enter.

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Next, type AUTH LOGIN and hit enter.

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Then, check the Send Base64 box and type the email address to authenticate and hit enter. You will see that Sconsole encodes it for you.

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Type in the password, and if it’s correct, you should get an immediate and clear result:

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If the password is incorrect, the error message should be equally clear.

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No fuss, no muss. No context switching.

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