Search online for a software application that uses one or more of PGP, S/MIME, SPF, or DKIM. Your reference source must be from the company or organization that produced the application, NOT from some

Search online for a software application that uses one or more of PGP, S/MIME, SPF, or DKIM.Your reference source must be from the company or organization that produced the application, NOT from some other organization that only sells or distributes it.  The source must NOT require any form of payment, subscription, registration, or login

In your own words (do not quote in any way from any source),using 50-80 words explain how the application provides information security services for email.

Dont use the following topics which i mention down there, these topics already been used by other students.

G Suite Enterprise, Education, and Enterprise for Education

https://support.apple.com/en-us/HT202345

https://gnupg.org/

S/MIME 

Actalis

https://www.openpgp.org/

Microsoft Outlook 

PGPTools 

PGP Command Line From Symantec 

Microsoft Exchange