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Is your mailserver secure? Want to test it to make sure you are not an Open Relay for spammers? Simply enter the IP or host.domain name for the mail server you wish to test.

Mailserver: (Example:

If any of the test failed or appeared in red, you may want to check your server configuration. Open Relay Check Tool is provided by a leading Dynamic DNS provider. If you host your own mail server and need a solution to get around your ISP's port blocking or just dont want to deal with the hassle of doing it yourself, then check out email services.

* We do our best to check to see if you mailserver is an open relay. Even if your mail server tests negative on this site, it may still not be 100% secure

IP Check Tool - Open Relay Check - Port Check Tool