Data are send by email for security purpose in which form
Data are sending by email for security purpose in encrypted form.
End-to-end email encryption is a method of transmitting data where only the sender and receiver can read email messages. With end-to-end email encryption, the data is encrypted on the sender's system. Only the intended recipient will be able to decrypt and read it.
Email encryption involves encrypting, or disguising, the content of email messages in order to protect potentially sensitive information from being read by anyone other than intended recipients. Email encryption often includes authentication.