Re: - Configuring and enabling Sender ID filtering in Exchange 2003 SP2

  • From: "Mark Fugatt" <markfu@xxxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 1 Nov 2005 17:00:31 -0000

If a spammer uses a domain that does not have an SPF record then it
would depend on how you have configured Sender ID filtering on your end,
if you configure to reject messages that do not come from a
domain/server with an SPF record defined then message would not be

Mark Fugatt 
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-----Original Message-----
From: nromero@xxxxxxxxxx [mailto:nromero@xxxxxxxxxx] 
Sent: 01 November 2005 16:57
To: [ExchangeList]
Subject: [exchangelist] Re: - Configuring and enabling
Sender ID filtering in Exchange 2003 SP2

Is SPF widely used?  I tested a couple of spam messages against the SPF link from this article.  The spammer was sending from a
domain that doesn't have an SPF record so the message would have passed.

Can spammers bypass this filter by simply using domains that do not have
SPF records?

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