Overview:

SPF Records authorize one company to send on behalf of another company. Without an SPF Record set up authorizing Distribion to send e-mail on behalf of your domains, your campaigns may be considered SPAM when we send them on your behalf. Thus, your e-mail campaign may not enjoy the greatest level of delivery.

How Does SPF Work:

The easiest way to explain what SPF records are is with an example.

Let's say you want to use our system to send out an e-mail from bill.gates@microsoft.com to steve.jobs@apple.com When the e-mail it sent, the apple.com server is going to look at the "From" address on the e-mail. (Which is bill.gates@microsoft.com) The apple.com server is then going to look at the SPF Record stored on microsoft.com and ask the question: "Does Distribion have authorization to send on your behalf?". If Microsoft's SPF record does not have our IP address listed as an authorized sender, then apple.com will probably treat the e-mail as SPAM. (As well it should!) 

So in a nutshell, an SPF Record is a list of people who are authorized to send on your behalf. If our servers are not listed in your SPF record, people may think we are trying to impersonate you and send SPAM.

Quick Note to Non-Technical Visitors:

Most of the information in this article is meant for IT Managers. If the e-mail address you are trying to use has been identified as lacking an SPF record, we would recommend forwarding this article to whatever IT specialists maintains the DNS for your e-mail address domain. (i.e. If your e-mail address is bob@somecompany.com, this information should go to whoever administrates somecompany.com. They will be the ones who need to create the record authorizing Distribion to send on behalf of www.somecompany.com).

Default SPF Record:

This SPF record covers the range of network addresses for the DMP and the native mail sever (MX record) for the domain authorizing the DMP to send on its behalf:

"v=spf1 mx include:_spf.dmplocal.com -all"

This needs to be entered all on one line and must include the quotes. Depending on the interface used to manage your DNS, the quotes may automatically be added for you on the backend after making the change. If you have an existing SPF record configured for your domain, make sure you simple ADD the necessary elements to that SPF record. If you create an additional, separate SPF record, it may cause problems. More details about the SPF specification can be found here: http://www.openspf.org/SPF_Record_Syntax

Whitelisted SMTP Servers:

Please whitelist the following range of IP addresses:

216.205.154.64/26

208.82.208.0/22

** Explanation of above IP range

216.205.154.64/26

  (slash notation of / 26)  has a range of (216.205.154.64 through 216.205.154.127)

208.82.208.0/22

   (slash notation of / 22) has a range of  (208.82.208.0 through 208.82.211.255)

These IP address blocks are solely utilized by Distribion and are not shared with any other parties. Transactional receipts and other system notices are sent from @dmpnotices.com - please also make sure to whitelist all e-mails sent from the @dmpnotices.com domain.