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Exploit-Dev Archives: Re: [Fwd: Netscape mail client error]

Re: [Fwd: Netscape mail client error]

Trevor Schroeder (tschroedACM.ORG)
Sat, 20 Nov 1999 08:49:58 -0600

On Fri, 19 Nov 1999, Blue Boar wrote:

> it hits clients. All that has to be done is to look for valid date/time
> ranges. It would probably also be smart to check that a piece of e-mail

Not even, all it would have to do is look for a valid date/time, period.

According to RFC 822:

        Section 4.1 says...

                orig-date = "Date" ":" date-time

        Section 5.1 says...

                date-time = [ day "," ] date time
                ...
                date = 1*2DIGIT month 2DIGIT ; day month year
                                                      ; e.g. 20 Jun 82

RFC 1123 changes date to

                date = 1*2DIGIT month 2*4DIGIT

All valid email must cary a msg with Date fields of the following format:

        D Mon YY
        DD Mon YY
        D Mon YYYY
        DD Mon YYYY

Anything else can be dropped.
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