8.55 on page 643 Use /etc/mail/trusted-users for trusted users.
use_cw_file ?§17.8.56 on page 643 Use /etc/mail/local-host-names for local hosts.
uucpdomain ?§17.8.57 on page 644 Convert UUCP hosts via a database (deprecated).
virtuser_entire_domain ?§17.8.58 on page 645 Match subdomains in the virtual user table.
virtusertable ?§17.8.59 on page 645 Support for virtual domains.
Table 17-7. FEATURE( )s available with the mc configuration technique (continued)
FEATURE( ) ?§ Description
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
614 | Chapter 17: Configure sendmail.cf with m4
17.8.1 FEATURE(accept_unqualified_senders)
Allow unqualified MAIL From: V8.9 and later
The MAIL From: command of the SMTP transaction is used to convey the address of the
envelope sender. RFC821 requires that the envelope sender address always be fully qualified.
That is, it must always have a user part, an @ character, and a domain part, in that
order.
The normal behavior of sendmail is to reject the envelope sender if it is not fully qualified.
For example:
MAIL From:
553 5.5.4 ... Domain name required
This rejection is done for network connections only. When reading the envelope sender via
the standard input under the -bs command-line switch(?§6.7.13 on page 236) a missing
@domain part is OK:
% /usr/sbin/sendmail -bs
220 yourhost.
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