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Verifying SPF String

An SPF record is a type of record attached to a domain that identifies which mail servers are permitted to send email on behalf of said domain. The creation of an SPF String would be made at the domain host level when migrating hosting services to Redtail. If Redtail is providing email hosting service for the domain, the SPF String should be:

v=spf1 ip4:65.74.131.96/27 ip4:65.74.153.192/27 ~all

 

Below you will find steps that will show you how to verify an SPF String for a domain:

Open your internet browser and navigate to https://mxtoolbox.com/. Once the page appears, it will default to the MX Lookup screen. To access the SPF Records Lookup, click the arrow on the MX Lookup button and select that option from the resulting menu:

 

You'll then see the below:

 

Within the box highlighted above, enter the domain on which you wish to verify the SPF String , followed by hitting Enter or clicking the SPF Record Lookup button to perform the query. Below is a sample of the query  results. As you can see below, the Value field lists both ip ranges (65.74.131.96/27, 65.74.153.192/27) within our SPF String. If this information is not displayed, then the domain does not have Redtail SPF information attached to it.

 

Mxtoolbox_SPF_Lookup_results.png

 

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