m

$=m

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List of local domains

V8.7 and above

When sendmail first begins to run, it figures out what your DNS domain is and assigns the result to the $m macro ($m). The sendmail program then processes the configuration file. This gives you the opportunity to redefine $m . After that, sendmail assigns the final value in $m to the class $=m .

Unfortunately, prior to V8.10 sendmail , the class macro $=m was not used by sendmail , nor by any of the configuration files produced by the m4 technique. Beginning with V8.10, $=m is used as part of screening to allow relaying. Note that $=m should not be used to have mail accepted as local under a variety of domains. Instead, use the domaintable feature (FEATURE(domaintable)).