An overview of E-Mailing-related and necessary technologies.

Security

Three technologies have evolved to avoid abuse.

• SPF: A domain record which lists all the servers from which it sends emails. Thus, if you receive an email from the "domain" but the underlying IP is not listed, it is likely fake
• DKIM: A crypto signature for verifying an E-Mail is sent from an domain. It is a public-key approach
• DMARC