It prevents spam and fraudulent messages from hackers or spammers. They look over each and every email before categorizing it. It is the most secure way to send an email. Review collected by and hosted on G2.com.

Some features are paid for, like Gmail and other mail services, but it's worth paying for some features. If they can give a chance to experience some features free for some time, it would be beneficial. Review collected by and hosted on G2.com.