SENDMAIL
TM
INSTALLATION AND OPERATION GUIDE
Eric Allman
Claus Assmann
Gregory Neil Shapiro
Sendmail, Inc.
Version 8.
708
For Sendmail Version 8.
13
SendmailTM
implements a general purpose internetwork mail routing facility under the UNIX® operating...
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SENDMAIL
TM
INSTALLATION AND OPERATION GUIDE
Eric Allman
Claus Assmann
Gregory Neil Shapiro
Sendmail, Inc.
Version 8.
708
For Sendmail Version 8.
13
SendmailTM
implements a general purpose internetwork mail routing facility under the UNIX® operating system.
It is not tied to any one transport protocol — its function may be likened to a crossbar switch,
relaying messages from one domain into another.
In the process, it can do a limited amount of message
header editing to put the message into a format that is appropriate for the receiving domain.
All of this is
done under the control of a configuration file.
Due to the requirements of flexibility for sendmail, the configuration file can seem somewhat unapproachable.
However, there are only a few basic configurations for most sites, for which standard configuration files have been supplied.
Most other configurations can be built by adjusting an existing configuration file incrementally.
Sendmail is based on RFC 821 (Simple Mail Transport Pro
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