Suped

SPF

A comprehensive collection of questions and answers about SPF email authentication from email marketers, experts and technical documentation.

Does a subdomain used for sending emails need its own SPF record?

SPF ~all vs -all: Which is better for email deliverability and spoofing protection?

How do SPF 'a' records affect DNS lookups and the 10-lookup limit, and what are the best practices?

How do broken SPF records, like those with too many DNS lookups or exceeding size limits, affect email deliverability and authentication?

How to check SPF macro values and how do they work?

How to troubleshoot intermittent email delivery failures caused by SPF and DNS issues?

Why does SPF resolution fail with CNAME records and other DNS entries?

How does CNAME delegation enable SPF and DKIM authentication for email sending?

Why is my SPF record too long and how to manage DNS TXT record length limits?

Why are Pardot and ExactTarget included in the same SPF record?

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