Use mail.test as domain in emails

[egonelbre]

Any testing data should use .test TLD. While example.com is probably not too bad, it's still preferred to use .test.

See https://en.wikipedia.org/wiki/.test

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[VinozzZ]

LGTM. Just curious why it's not ideal to use.com for example emails?

[egonelbre]

Because this can end in sending testing data to people. example.com probably is fine, but everything else (e.g. mail.com, initech.com) belong to actual companies and people.

.test is specifically designed such that it doesn't belong to anyone and noone can register a domain with it.