sender verification

[Mauricio Cavalcanti]

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I read some similar in http://spf.pobox.com and in downloads they put a 
modified sendmail that makes this kind of test (spf), but i didn´t tested 
yet.

Anyone did it?

>From: Jim Holland <mailscanner at MANGO.ZW>
>Reply-To: MailScanner mailing list <MAILSCANNER at JISCMAIL.AC.UK>
>To: MAILSCANNER at JISCMAIL.AC.UK
>Subject: sender verification
>Date: Tue, 10 May 2005 20:54:01 +0200
>
>Hi Julian
>
>I see that there has been some discussion earlier about the use of
>milter-sender with sendmail to verify that the sender's address does exist
>before accepting mail.  That then allows mail to be rejected at connection
>time if the sender's address seems to be fraudulent.
>
>I like the idea behind milter-sender, but would much prefer it to be
>integrated with MailScanner rather than sendmail, so that false positives
>(eg no-reply type addresses and other mail blocked due to problems that
>are sure to arise) result in mail being quarantined rather than bounced.
>Is this an option that you would be interested in accepting on the
>wishlist for future development of MailScanner?
>
>Regards
>
>Jim Holland
>System Administrator
>MANGO - Zimbabwe's non-profit e-mail service
>
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