4.10 Sendmail Macros

Sendmail macros are referenced exactly the same way they are in sendmail.cf configuration file, i.e. ‘$name’, where name represents the macro name. Notice, that the notation is the same for both single-character and multi-character macro names. For consistency with the Sendmail configuration the ‘${name}’ notation is also accepted.

Another way to reference Sendmail macros is by using function getmacro (see Macro access).

Sendmail macros evaluate to string values.

Notice, that to reference a macro, you must properly export it in your MTA configuration. Attempt to reference a not exported macro will result in raising a e_macroundef exception at the run time (see uncaught exceptions).