> I think an appropriate filter on the Date header would reject anything
> other than A-Z a-z 0-9 and "+", "-", ":", and ",". Does anybody
disagree?
> Does anybody know how to set that up?
Sounds correct.
Do you have this one?
/[[:^print:]]{5,}/ REJECT RFC 1893 ERROR 5.6.2 Conversion of high bit
header required and prohibited by RFC 2047.
That should block chunks of non printable characters in any header.
To reinforce it for date:
/^Date: .*[[:^print:]]/ REJECT RFC 1893 ERROR 5.6.2 Conversion of high bit
header in date required and prohibited by RFC 2047.
The [[:^print:]] is a non printable character.
--Eric
