Email security
How do I check my SPF record?
Short answer: Enter your domain in a free checker like DomainGuard — it looks up your TXT records, finds the v=spf1 line, and tells you if it is valid, strict and under the 10-lookup limit.
The full answer
A good check confirms there is exactly one SPF record, that it ends in -all or ~all, and that it uses no more than 10 DNS lookups.
You can also look it up yourself with a command like nslookup -type=txt yourdomain.com, but a checker explains the result in plain language.
Want step-by-step help? Read What Is SPF? How to Set Up an SPF Record.