MAMP Pro makes it very easy to set up a PHP development environment. It even makes configuring your Postfix mail server configured most of the way. If you are using Postfix as a smart host to send mail through your ISP or your business mail server and your mac username (shortname) is not the same as the username part of your email address then you have to set up the correct sender address in your Postfix configuration. Here is how you do it.

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