HPlogo Installing and Administering Internet Services: HP 9000 Networking

Chapter 4 Installing and Administering sendmail

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Table of Contents

Deciding Whether to Install sendmail
Installing sendmail
Installing sendmail on a Standalone System
Installing sendmail on a Mail Server
Installing sendmail on a Mail Client
Verifying Your sendmail Installation
Creating sendmail Aliases
Adding sendmail Aliases to the Alias Database
Verifying Your sendmail Aliases
Managing sendmail Aliases with NIS or NIS+
Rewriting the "From" Line on Outgoing Mail
Forwarding Your Own Mail with a .forward File
How sendmail Works
Message Structure
How sendmail Collects Messages
How sendmail Routes Messages
Default Client-Server Operation
How sendmail Handles Errors
Sendmail and the LDAP Protocol
Enabling Address Lookups Using LDAP
Modifying the Default sendmail Configuration File
The sendmail Configuration File
Restarting sendmail
Forwarding Non-Domain Mail to a Gateway
Configuration Options
Migrating the sendmail Configuration File
Security
Turning Off Standard Security Checks
Configuring sendmail to Reject Unsolicited Mail
Enabling "Anti-Spamming" Capability
Accepting and Rejecting Mail From Particular Senders
Preventing Unauthorized Mail Relay Usage
Sendmail Validation
Sendmail Anti-Spamming Security
Enabling Sendmail Anti-Spamming Security Features
Using the Access Database to Allow or Reject Mail Messages
Relaying Capability
Validating Senders
Header Checking
Turning off Virtual Interfaces
Troubleshooting sendmail
Keeping the Aliases Database Up to Date
Verifying Address Resolution and Aliasing
Verifying Message Delivery
Contacting the sendmail Daemon to Verify Connectivity
Setting Your Domain Name
Attempting to Start Multiple sendmail Daemons
Configuring and Reading the sendmail Log
Printing and Reading the Mail Queue

This chapter describes sendmail, the Internet Services mail routing facility. sendmail relays incoming and outgoing mail to the appropriate programs for delivery and further routing. sendmail allows you to send mail to and receive mail from other hosts on a local area network or through a gateway.

This chapter contains the following sections:

You cannot use SAM to install, configure, or enable sendmail.

For more detailed technical and conceptual information about sendmail, we strongly recommend you see sendmail, 2nd edition, by Bryan Costales with Eric Allman and Neil Richert, published by O'Reilly and Associates, Inc. Note that the sendmail, 2nd edition book describes sendmail version 8.8, and so some configuration options it describes might not be supported by the sendmail version included with HP-UX 11.0. For information about using sendmail with BIND, we strongly recommend you see DNS and BIND, by Paul Albitz and Cricket Liu, also published by O'Reilly and Associates, Inc.

Note that you can get information about the above books (including retail outlets where you can buy them, as well as how to order them directly from O'Reilly) by visiting the O'Reilly WWW site:

http://www.ora.com

Once you are at the O'Reilly site, look in the catalog, under the category "System and Network Administration." The above books are listed under "Network Administration."

You also can visit the WWW site for sendmail:

http://www.sendmail.org

NOTE: sendmail for HP-UX 11.0 is an HP implementation of version 8.9.3 of publicly-available sendmail software. HP provides support for the features documented in this chapter and in the sendmail man page.
© 2000 Hewlett-Packard Development Company, L.P.