There are various vulnerabilities occupied in electronic mail communication. Various of the most common are: eavesdropping, spoofing and masquerading, man-in-the-middle attack, session hijacking, information manipulation, Malware, sociable applied science, password guessing, and data leaks.
Zixmail
The vulnerability of eavesdropping is resolved by electronic mail encryption for communications that necessity confidentiality.
Spoofing and masquerading are cleared by the use of Digital certificates issued by a trusted certificate dominance that proves to the customer/receiver that the sender of an electronic mail is who he claims to be.
Man-in-the-middle attack or session hijacking tricks an electronic mail server to commit their informations through a third note. This is countered by digitally signing informations, controlling that both parties authenticate all other. Encrypting the e-mails would moreover counter this vulnerability.