Upgrading Postfix 2.0.16 to 2.1.1

[Robert Fitzpatrick]

I notice the portupgrade for Postfix will take me to version 2.1.1 from my current version of 2.0.16 on FreeBSD 5.2.1. Of course, I will check the RELEASE NOTES and I also know some of the syntax in my main.cf will need to change. Just want to see here if there is anything that should be watched out for or is this a trivial upgrade?

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Robert