[EMAIL PROTECTED] skrev:
Tom Smith writes:
Is it safe to assume that most MTAs will give up trying after four or five days if a message is still undeliverable, even if it's getting a temporary error? (The spam I referred to is dated in 2003, but I don't want to set a date limit that old--perhaps a week or two.)

Like I said before, it's sort of safe, but you might also want to consider rewriting the dates of the e-mails which are sort of strange but not strange enough for you to block... that way the spam with bad dates won't go to the top of the users e-mailprograms with a less than perfect sorting algorithm. (Something I'm getting a touch of right now as I've had to urgently move to a solution where my date-rewriter is no longer available and the mailprogram has a lousy sorting algorithm...)
  /Tony




I will suggest using the tests in spamassassin, DATE_IN_PAST_xx_yy. You can set the score of one of the test high enough that mails are blocked.

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