Im using header_checks and body_checks to block spam, but some legitimate email is blocked by my checks. Is there any way to whitelist some mail so that the header and body checks are not applied?
No. Header and body checks are applied to every message and should be used for simple checks that can easily be applied to all mail. If you need anything more sophisticated, you should set up a content filter that has the smarts you need. However, if you just want to disable content checks for your own users, see the How-To ” Turning Off Body and Header Checks for Internal Users.” If you want to create your own content filter, you can certainly do that, but there are many spam-blocking tools already available such as SpamAssassin or Bogofilter. These tools generally allow you to specifiy whitelisting rules. See “Virus/SPAM content filters” on the Postfix Add-on Software page.
