Free email tools.

Check your domain’s settings or find out what happened to an email. Clear results, with no account required.

Check published settings

See which records your SPF depends on and find common problems with lookup limits.

Find your domain’s email policy and understand its reporting and alignment settings.

Look up a signing key and check its format, strength and published settings.

Check SPF and DMARC across a list of domains and export the results.

Compare SPF, DMARC or DKIM records returned by Google and Cloudflare.

Compare DNS answers from probes across six world regions, including exact records and TTLs.

Find services referenced by SPF, confirm which you use and export your working list.

Build one proposed SPF record from your existing records and sending services.

Preview lookup counts and rule changes before updating your DNS.

Choose your policy and reporting settings, then copy the DNS name and record.

Read the authentication results and delivery route recorded in an email’s headers.

Turn a local report file into sending IPs, message counts and authentication results.