On Tue, Jul 19, 2011 at 08:59:24AM +0200, Jeroen Geilman wrote: > I use a (relatively) simple regex header check to winnow out old or > impossible dates; alas, it is not possible to compare two headers with > header_checks.
Rejecting old dates is not very safe, messages can be Resent, in some cases years later, so Date: should not be subjected to age limits when Resent-Date: is also present. Header checks is most profitably used to reject time-traveling messages from the future. -- Viktor.