Is there a way to create an encrypted email with no third party application I would like to send and receive emails between group of people. Is there a way to create it with no need to use some other 3rd party application. Is there a way just to transfer files between 2 people so there won't be any way to decrypt it by any other technology?
It depends on what email host you use. Hosts like Gmail have built in SSL encryption. There are other standards like the S/MIME encryption feature built into Microsoft Outlook. Check out this post https://superuser.com/questions/25658/gmail-and-ssl-encryption-how-much-is-encrypted