Alias magic override rewrite

alias_magic override rewrite, $nT
Rewrite rules can override the   MTA option setting and   (source) channel option setting. Specifically, a construct of the form   , where    is an appropriate value for the   MTA option, overrides the setting for the domain when the rule matches during alias expansion.

See also:
 * alias_magic MTA Option
 * aliasmagic Option
 * Rewrite rule template substitutions and control sequences