P-Precedence Definitions

You can define values for the Precedence: field using the P control line. The syntax of this field is:

Pname=num

When the name is found in a Precedence: field, the message class is set to num. Higher numbers mean higher precedence. Numbers less than zero have the special property that error messages are not returned. The default precedence is 0 (zero). For example:

Pfirst-class=0
Pspecial-delivery=100
Pjunk=-100