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Linux E-mail by Ralf Hildebrandt, Patrick Ben Koetter, Magnus Back, Ian Haycox, David Rusenko, Carl Taylor, Alistair McDonald

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Troubleshooting Postfix problems

Postfix provides many tools to simplify problem solving. While implementing new features in your Postfix mail system, do it step by step. The more unsure you are in what you are doing, the smaller should be the steps that you take. If you run into problems, you will discover them early and it will be easier to figure out what went wrong. This is especially true when implementing complex lookup tables using MySQL databases.

Note

If you are even slightly uncomfortable with complex lookup tables, never introduce a new feature and a complex lookup table configuration at the same time. If something breaks, you will have much more trouble figuring out where to start.

When trying out new configurations, it does not hurt ...

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