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Webmin Administrator's Cookbook by Michał Karzyński

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Debugging e-mail-related problems

You will learn most about your mail server by talking to it directly in SMTP through a Telnet session. At the same time, you should be monitoring mail logfiles for any messages that occur while you're performing your tests.

In this recipe, we cover a number of techniques for testing and debugging e-mail systems. We will demonstrate how to test your system's ability to:

  • Receive e-mail by submitting a message directly over SMTP
  • Send e-mail by sending a message though the mail command
  • Authenticate users

We'll also mention the location of mail logs, various ways of sending e-mail, debugging SMTP authentication, and other topics. Read on; this recipe should give you a way to find the solution to your problem.

Getting ready ...

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