The default was that SMTP was automatically defined if either NETINET or
NETISO was defined; otherwise, SMTP was undefined.
Beginning with V8.12, the SMTP compile-time macro has been deprecated and removed. It
is now impossible to exclude SMTP support from sendmail.
If a precompiled sendmail lacks SMTP support, an attempt to use sendmail??™s -bs commandline
switch will result in this fatal error:
I don't speak SMTP
SMTP activity can be watched with the -v command-line switch (?§6.7.47 on page 249).
3.4.58 SMTPDEBUG
Enable remote debugging Debug with confENVDEF
The sendmail program allows the developer to turn on debugging and to print the queue
from any remote site. This capability is useful for solving occasional problems but opens a
potentially wide security hole.
In general, SMTPDEBUG should always be undefined. Later, when you become more
expert with sendmail, you might want to have a standby version of sendmail ready (one
with SMTPDEBUG defined), just in case you need it.
There is no debugging switch that will let you know whether a precompiled version of
sendmail had this defined. Instead, you must run sendmail with -bs, then issue the
SHOWQ SMTP command. If that command displays the mail queue, that precompiled
sendmail was built with SMTPDEBUG defined, and so you should not use it!
3.4.59 SMTPLINELIM
Default for obsolete F=L flag Don??™t change
Each delivery agent that is defined in the configuration file may or may not have an L= (line
length) equate (?§20.
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