RE: Issue with sending an email - opinion needed

  • From: "Carl Houseman" <c.houseman@xxxxxxxxx>
  • To: "'[ExchangeList]'" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 3 Oct 2005 12:20:26 -0400

It is your problem.  There are many mail systems that require sending mail
systems to have reverse DNS resolution.


From: Dan Crain [mailto:DanC@xxxxxxxxxxxx] 
Sent: Monday, October 03, 2005 11:37 AM
To: [ExchangeList]
Subject: [exchangelist] Issue with sending an email - opinion needed

I have a city we send email to, or try to and below is their solution. 
Is this a problem of mine or a problem of their Junk Mail server?
Dan Crain
From: Help Desk 
Sent: Thursday, June 09, 2005 1:24 PM
To: All Staff Distribution List (ASDL)
Subject: E-mail not being received

Some people are receiving complaints that they can not send the City e-mail.
The majority of these issues are due to their mail server not having what is
called a "Reverse DNS entry" that matches their outgoing e-mail server's
"DNS entry." This is a technique used by spammers to try and hide their
identity, therefore the new spam server blocks them.  They can contact their
Internet Service Provider (ISP) for more information about setting up a
"Reverse DNS entry" for their outgoing mail server.  In addition (but not in
place of) they can fax a copy of the rejected e-mail showing the full
headers (all the techno jargon at the top of an e-mail before the From:,
to:, and subject: lines) and we can look to see if their outgoing mail
server has a reverse DNS entry on our part of the Internet.  Because this
involves a configuration on their end, there is nothing we can do to permit
their e-mail from entering our system with the spam blocker running


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