SPF: Who Sent It?

The Sender Policy Framework and how to work with it

What is SPF?
Sender Policy Framework (SPF) is one of several open standards that enable email authentication. SPF allows domain name owners to create a whitelist of IP a...
Mon, 26 Dec, 2022 at 11:02 AM
Valimail SPF Records
Valimail's customers utilize SPF records which contain macros. The records allow our customers to leverage Valimail's patented technology to direc...
Mon, 4 Apr, 2022 at 1:44 PM
SPF Flattening
It is very common for organizations, when constructing or modifying their SPF record, to run up against the 10 DNS lookup limit. This limitation restricts t...
Tue, 23 Feb, 2021 at 2:00 PM
Working around Vendor Verification of SPF
When adding a new vendor it is not unusual for the vendor to have an automated process to verify that the SPF and/or DKIM settings are properly configured o...
Wed, 17 Feb, 2021 at 4:06 PM
Trailing SPF Includes in Valimail Delegated Domains
The Valimail SPF directives should be sufficient to allow SPF validation of any service.  So for the purposes of email authentication, no additional directi...
Mon, 26 Dec, 2022 at 11:02 AM