Email & SMTP

Envelope vs Header

The distinction between SMTP envelope addresses (MAIL FROM/RCPT TO) used for routing, and email headers (From/To) displayed to users — they can differ.

相关协议

SMTP

在指南中提及

Email Header Analysis: Tracing Delivery Path Email Delivery

另请参阅

SMTP Relay Email & SMTP

SPF, DKIM, and DMARC Email & SMTP

MTA (Mail Transfer Agent) Email & SMTP

Backscatter Email & SMTP