Test your mail server
Testing Deliverability
Several third-party services can help test the configuration of a mail server.
| URL | Description | Note |
|---|---|---|
| https://campaigncleaner.com/tools/mail-tester/ | This service currently allows unlimited checking of SPF, DKIM, and DMARC | |
| https://www.mail-tester.com | This service limits 3 emails per day | |
| http://multirbl.valli.org | Send a test email and look for any red flags | |
| https://www.spamscore.net/ | ||
| https://www.senderscore.org/ | ||
| https://glockapps.com/ | ||
| https://www.gmass.co/inbox | ||
| https://dmarc.org/resources/deployment-tools/ | ||
| https://toolbox.googleapps.com/apps/checkmx | ||
| https://postmaster.google.com/u/0/managedomains | ||
| autoreply@dmarctest.org | ||
| check-auth@verifier.port25.com | ||
| https://dkimvalidator.com/ | Send a test email and see if DKIM/SPF validation passes | This service no longer seems to work |
Send a test letter
Once you pick a service to test, try sending mail to the address using the following methods:
Test to ensure the mail server is not an open mail relay!