Mailing List Archive: Weird SPF Record!

Weird SPF Record!

Jun 12, 2009, 6:17 AM

Post #1 of 3 (3131 views)

One of our clients is having trouble sending us e-mail, so I ran a DNS
report. They have a weird SPF record that I've never seen before.
("v=spf1 include:spf.messaging.microsoft.com include:listrak.com ~all"
[TTL=3600]) The part that is confusing to me is the include:
spf.messaging.microsoft.com. I did an Nslookup and it doesn't return an
IP address. I also did a search on the internet and all I found were
other domains using this string in their SPF record. Does anybody have
any ideas what this record does and how it works? If SPF records are
used to verify that the mail is coming from an authorized IP and this
record does not resolve to an IP, then how does it work?

Thank You,

Jeff Wampler
IT Director

The Standard Group
610.375.6174 ext 157

Four companies, one goal in mind...
Setting the standard for excellence

Standard Offset www.standardoffset.com
Acorn Press www.acornpress.com
Veitch Printing www.printvpc.com
Calloway Network www.callowaynetwork.com

-------------------------------------------
Sender Policy Framework: http://www.openspf.org
Modify Your Subscription: http://www.listbox.com/member/
Archives: https://www.listbox.com/member/archive/735/=now
RSS Feed: https://www.listbox.com/member/archive/rss/735/
Powered by Listbox: http://www.listbox.com

Re: Weird SPF Record! [ In reply to ]

stuart at bmsi

Jun 12, 2009, 7:32 AM

Post #2 of 3 (3011 views)

Permalink

On Fri, 12 Jun 2009, Jeff Wampler wrote:

> One of our clients is having trouble sending us e-mail, so I ran a DNS
> report. They have a weird SPF record that I've never seen before.
> ("v=spf1 include:spf.messaging.microsoft.com include:listrak.com ~all"
> [TTL=3600]) The part that is confusing to me is the include:
> spf.messaging.microsoft.com. I did an Nslookup and it doesn't return an
> IP address. I also did a search on the internet and all I found were
> other domains using this string in their SPF record. Does anybody have
> any ideas what this record does and how it works? If SPF records are
> used to verify that the mail is coming from an authorized IP and this
> record does not resolve to an IP, then how does it work?

For SPF records, you look up the TXT record:
spf.messaging.microsoft.com descriptive text "v=spf1 include:spfa.frontbridge.com include:spfb.frontbridge.com -all"

--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

-------------------------------------------
Sender Policy Framework: http://www.openspf.org
Modify Your Subscription: http://www.listbox.com/member/
Archives: https://www.listbox.com/member/archive/735/=now
RSS Feed: https://www.listbox.com/member/archive/rss/735/
Powered by Listbox: http://www.listbox.com

Re: Weird SPF Record! [ In reply to ]

stuart at bmsi

Jun 12, 2009, 7:53 AM

Post #3 of 3 (2991 views)

Permalink

On Fri, 12 Jun 2009, Jeff Wampler wrote:

> One of our clients is having trouble sending us e-mail, so I ran a DNS

Based on my attempt to send you email, I would suggest checking your
vacation message system.

--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

-------------------------------------------
Sender Policy Framework: http://www.openspf.org
Modify Your Subscription: http://www.listbox.com/member/
Archives: https://www.listbox.com/member/archive/735/=now
RSS Feed: https://www.listbox.com/member/archive/rss/735/
Powered by Listbox: http://www.listbox.com