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Re: anyone rejecting incorrect dates with pcre header_checks?

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  • Troy Piggins
    ... Thanks mate. I m doing some testing on this now. -- Troy Piggins
    Message 1 of 4 , Apr 28, 2011
      * Duane Hill wrote :
      > Thursday, April 28, 2011, 1:19:11 AM, you wrote:
      >
      > > Troy Piggins wrote:
      >
      > >> Wondering how you're solving this for emails sent with Date: headers
      > >> way in the past or future. What do you think is a reasonably
      > >> acceptable in terms of dates. 3 days each side of the "correct"
      > >> date? 3 months? Years?
      > >>
      > >> How do you keep the header_checks updated as time goes by? I was
      > >> thinking a cron script that modifies the header_checks file, but
      > >> that may be a bit clumsy?
      >
      > > /^Date: .* (19[0-9][0-9]|200[0-9]|2010)/ REJECT Your email is stuck in a timewarp
      >
      > > Works for me. I find that bad date are usually years out. The
      > > three that were rejected in the past 24 hours were from 1980
      > > and two from Apr 2010.
      >
      > I've also been using these now for close to five years without any
      > complaints. I did at first use WARN instead of REJECT to monitor the
      > results. Each line after the commented line should be on one line.
      >
      > # Invalid time in date header
      > /^Date:.*(2[4-9]:[0-9]{2}:[0-9]{2}|[3-9][0-9]:[0-9]{2}:[0-9]{2}|[0-9]{1,2}:[6-9][0-9]:[0-9]{2}|[0-9]{1,2}:[0-9]{2}:(6[2-9]|[7-9][0-9]))/
      > REJECT invalid time in date header
      >
      > # Invalid time zone offset in date header
      > / \d\d:\d\d:\d\d [^+-][2-9][5-9][0-9][0-9]\s*$/ REJECT invalid time
      > zone offset in date header
      >
      > # Invalid date in date header
      > /^Date:.*((3[2-9]|[4-9][0-9]) Jan|[3-9][0-9]
      > Feb|(3[2-9]|[4-9][0-9])Mar|(3[1-9]|[4-9][0-9]) Apr|(3[2-9]|[4-9][0-9]) May|(3[1-9]|[4-9][0-9]) Jun|(3[2-9]|[4-9][0-9]) Jul|(3[2-9]|[4-9][0-9])Aug|(3[1-9]|[4-9][0-9]) Sep|(3[2-9]|[4-9][0-9]) Oct|(3[1-9]|[4-9][0-9]) Nov|(3[2-9]|[4-9][0-9]) Dec)/ REJECT invalid date in date header
      >

      Thanks mate. I'm doing some testing on this now.

      --
      Troy Piggins
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