Chapter 21. The D (Define a Macro) Configuration Command

Defined macros allow strings of text to be represented symbolically inside a sendmail configuration file.

What’s New with V8.13

The behavior and use of most defined macros has not changed in V8.13. However, the values in two have changed, and eight new macros have been added:

  • Two existing macros, ${auth_author} and ${auth_authen}, now have their values stored in xtext format (Section 21.1.1 [V8.13]).

  • The new macro ${client_connections} holds the current number of connections to the listening server (Section 21.1.2 [V8.13]).

  • The new macro ${client_ptr} holds the result of a PTR lookup of the connecting hosts IP address (Section 21.1.3 [V8.13]).

  • The new macro ${client_rate} holds the number of inbound connections to the listening server over a specified interval (Section 21.1.4 [V8.13]).

  • The new macro ${msg_id} holds the value of the current Message-Id: header (Section 21.1.5 [V8.13]).

  • The new macro ${nbadrcpts} holds the number of envelope recipients for the current envelope that were not accepted (Section 21.1.6 [V8.13]).

  • The new macro ${quarantine} holds the reason an envelope has been quarantined (Section 21.1.7 [V8.13]).

  • The new macro ${time} holds the current time in seconds (Section 21.1.8 [V8.13]).

  • The new macro ${total_rate} holds the total number of inbound connections to the listening server over a specified interval (Section 21.1.9 [V8.13]).

The ${auth_author} and ${auth_authen} Macros

Some macros are assigned values ...

Get sendmail 8.13 Companion now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.