Giampaolo Tomassoni wrote:
> Hi everybody,
> anyone knows of a SA plugin to score mails based on challenging the sender
> e-mail?
> I don't mean C/R, but instead just attempt an SMTP session in order to see
> if the source mailbox is known to the sending domain's MX. If it isn't, the
> plugin applies a score to the e-mail.
> I know I could do something like this in my postfix, but this way I would
> totally reject e-mails carrying a wrong From: header. Since some people seem
> to be a bit dyslectic in writing its own e-mail address, I would prefer not
> to reject unless there are some other reasons too (i.e.: the mail hits some
> other SA rules).
> Thanks,
> Giampaolo


There are a number of milters that can help with this, such as
milter-ahead and milter-sender



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