HP-UX Mailing Services Administrator's Guide

Mailing Services Overview
The Sendmail Utility
Chapter 1 29
Figure 1-1 Flow of Mail Through Sendmail
OpenMail
Delivery
Agent
User Agents
OpenMail
or X.25
Network
X.400
Network
Local
Area
Network
Telephone
Lines
Mailboxes
Communications
Media
OpenMail
Receiving
Agent
X.400
Receiving
Agent
SMTP
Server
UUCP
Receiving Agents
Sendmail
Destination Host
Local
Mailer
...
Mail
Recipient User
mail
elm
User Agents
mail/rmail
...
Directory
mail
elm
Local Host
Delivery Agents
Local
Mailer
UUCP
SMTP
Delivery
Agent
X.400
Delivery
Agent
mail/rmail
Sendmail
User
Local