2018-02-07 20:01:12 +00:00
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The Postfix default configuration can easily be extended by providing a `config/postfix-main.cf` in postfix format.
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This can also be used to add configuration that is not in our default configuration.
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For example, one common use of this file is for increasing the default maximum message size:
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```
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# increase maximum message size
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message_size_limit = 52428800
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```
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2019-08-21 08:39:20 +00:00
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That specific example is now supported and can be handled by setting POSTFIX_MESSAGE_SIZE_LIMIT.
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2018-02-07 20:01:12 +00:00
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[Postfix documentation](http://www.postfix.org/documentation.html) remains the best place to find configuration options.
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Each line in the provided file will be loaded into postfix.
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Have a look at the code for more information.
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