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SPF record for MIT.Edu

Does MIT have a Sender Policy Framework (SPF) record?

Context

SPF is a system that says what IP addresses are allowed to send mail on behalf of @mit.edu email addresses.

Answer

Yes, MIT has an SPF record. It is a lenient one. You can use a DNS lookup command to look it up. (Output wrapped for clarity.)

nslookup -type=txt mit.edu

answer:
mit.edu text = "v=spf1 ip4:18.7.7.0/24
ip4:18.7.21.0/24 ip4:18.72.0.0/16
ip4:18.7.68.0/24 ip4:18.7.68.0/24
ip4:18.9.25.0/24  ~all"

The "ip4" sections mean "mail that is from a @mit.edu address ought to come from the named IP ranges." (Result: Pass. Intended action: accept.)

The "~all" on the end means: "mail from all other IPs is discouraged but not forbidden; it is okay to accept such mail." (Result: SoftFail. Intended action: accept but mark.)

More information

http://www.openspf.org/

http://en.wikipedia.org/wiki/Sender_Policy_Framework

http://tools.ietf.org/html/rfc7208

http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/

IS&T Contributions

Documentation and information provided by IS&T staff members


Last Modified:

May 22, 2014

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