Безопасен ли airmail.net?

This is just a texas based internet service provider. Since they provide their customers with an email address it is the same as anyone with a gmail or yahoo address. They could be using it to spam people or in a perfectly fine way. Just depends on the user.

Appeared on a SPAM list; Attention please if you impart your mail addres you should be aware of spam-danger; so better use throw-away mail services or avoid such sites you don't trust. Often such sites contain porn, fraud, phish, malware or just annoying advertising of useless products.