Increase Postfix Mail Size Limit

Quick note on how to increase the mail size limit in postfix….

The configuration option is “message_size_limit” and by default is set to 10240000 bytes which is roughly 10MB. You can see what setting your postfix is by running:

postconf message_size_limit

For the default setting, you’ll see this:

message_size_limit = 10240000

To change the setting to some other value, open the file in your favourite text editor

vi /etc/postfix/

either edit or add the following line…

message_size_limit = 20480000

Above example is 20MB.

Then reload postfix:

service postfix reload

and your setting will take effect.

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