Free email tools.

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

SPF checker

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.

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

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