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Koltrix

Free tool

Build your SPF record in a minute.

Pick who sends mail as your domain and get the exact TXT record to publish, with the 10-lookup limit checked. It runs in your browser: nothing you type is uploaded.

Who sends mail as your domain?

Your record

Type
TXT
Name / host
@ (the root of your domain)
Value
v=spf1 include:_spf.koltrix.com ~all
Nothing leaves your browser. This runs locally.

A domain may have only one SPF record. If it already has one, merge the new parts into it instead of adding a second. Lookups used before counting nested includes: 1 of 10.

Tired of doing this by hand?

Koltrix generates these records for your domain and checks them live while you set it up. 7 days free, no card.

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More free tools: all of them · SPF, DKIM and DMARC explained