DNS queries on HTML mail in Outlook

  • From: "Thomas W Shinder" <tshinder@xxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 2 May 2005 12:49:50 -0500

Hey folks,
Here's an interesting finding on an Outlook 2003 client. I found that
when an HTML message comes in that has A HREF references to it, Outlook
does a DNS query for the domains included in the message. I have pack
captures showing this. Anyone ever head of such a thing?

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