TXT record name
Some DNS panels use @ for the main domain.
ToolsSPF record generator
SPF record generator: wikipedia.org
TXT record value
Split version, each part at most 255 characters (for older DNS panels)
Each include, a and mx costs one DNS lookup, and includes nested inside them count too. IPs written directly cost nothing. Counts for the listed services were measured on 2 Nov 2026.
A domain may have only ONE SPF record (starting with v=spf1). If your DNS already has one, edit it instead of adding another. Two SPF records at once break SPF.
How to use it
- Open the DNS panel for the domain and look for a TXT record starting with v=spf1. Edit it if it exists, otherwise add a new one.
- Paste the name and value above exactly, then save.
- Wait from a few minutes to a few hours for DNS, then confirm with Email check.
Build an SPF record for your mail domain
SPF is a TXT record listing who may send mail as your domain. Receivers use it to tell real mail from fakes. This tool builds the record in your browser and counts the DNS lookups for you.
I already have an SPF record. What now?
Edit the existing record instead of adding a second one. Two SPF records on one domain break SPF. Tick every service that sends your mail, then replace the old value with the new one.
What is the 10 DNS lookup limit?
Each include, a and mx makes the receiver do one more DNS lookup, including includes nested inside them. More than 10 and SPF fails, so mail is more likely to land in spam. IPs written directly cost nothing.
~all or -all?
Start with ~all. Once you are sure every sender is listed and DMARC is in place, you can switch to -all to reject spoofed mail more firmly.