SYNOPSIS

CheckFromHeader = [true | false]

DESCRIPTION
The CheckFromHeader slow.conf configuration item can allow the From: header to be checked for validity. It also allows the host part of the SMTP MAIL FROM: address to be check for valitity.

If this CheckFromHeader slow.conf configuration item is declared as true (or if it is omitted which defaults to true), the Milter will first check the From: header (if there is one in the message). If that header's host part cannot be looked up with gethostbyname, that bad status is marked by setting the frm event (as described in the standard event set).

If this CheckFromHeader slow.conf configuration item is false, the above check is skipped. In the event you have a slow network, or slow DNS lookups, you may wish to define this CheckFromHeader as false, because gethostbyname may cause your Milter to time out and thus to become inefective.