Secure mail encrypts any email messages you send to ensure that if they end up in the wrong person’s inbox or they’re somehow grabbed off your computer or the recipient’s computer that they can’t be read. Given how much information travels via email these days it’s of the utmost importance that you protect your communications with others. Even if you’re emailing simple stuff like your phone number or address that can be used to devastating effect by the wrong person. You don’t want to run into those issues so you should look into secure mail services.
Generally it’s quite simple to encrypt your email. You just need to purchase a program that will do it for you and then make it so the person on the other end can read it. If they’re the proper recipient of your message they’ll have no trouble reading what you’re sending. If not then they would have to be a highly advanced code cracking individual to be able to read what you sent through. You’ll deter all but the most skilled crackers from seeing what you’re sending. Obviously it’s more important if you’re sending sensitive information. If you have a business you really need to look into secure mail.