Tools

SPF builder for DNS TXT records

Look up the current SPF record for a domain, add approved sending servers, and build one clean TXT value to copy into DNS.

Build a new SPF record

Domain

Enter the root domain. The tool reads public TXT records and keeps the result on this page only.

Start from the current SPF record Keep existing approved senders and add the new ones below.

Add common senders

Microsoft 365 / Exchange Online include:spf.protection.outlook.com Google Workspace include:_spf.google.com Current MX mail servers mx Website A record a

Add other sending servers or SPF mechanisms

One per line. Plain IPs become ip4: or ip6:. Plain domains become include:domain.

Fail policy

Use hard fail only when you are confident every legitimate sender is included.

SPF Builder FAQ

Clear answers for SPF records, Microsoft 365 mail flow, CRM senders, and DNS publishing.

What is an SPF builder?

An SPF builder helps create a valid Sender Policy Framework TXT record by combining your current approved senders with new mail services such as Microsoft 365, Google Workspace, a CRM, a website, or a newsletter platform.

Can a domain have more than one SPF record?

No. A domain should publish one SPF TXT record only. Multiple SPF records can cause SPF to fail, which can hurt email delivery and weaken protection against spoofing.

What should I include in an SPF record for Microsoft 365?

Microsoft 365 normally requires include:spf.protection.outlook.com, but the final record must also include any other approved services that send email for the domain, such as a CRM, website, invoicing system, or marketing platform.

Will this SPF Builder update my DNS automatically?

No. The SPF Builder reads public DNS and creates a copy-ready TXT value. You still need to publish the record in your DNS hosting panel or ask ITried to confirm and publish it safely.