sendmail, 4th Edition

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

${addr_type} on page 803	Existing ${addr_type} now shows envelope/sender for header type addresses too (8.14)
${auth_authen} on page 804	Existing ${auth_authen} has its value xtext-encoded (8.13)
${auth_author} on page 805	Existing ${auth_author} has its value xtext-encoded (8.13)
${client_connections} on page 811	New ${client_connections} counts simultaneous client connections (8.13)
${client_rate} on page 814	New ${client_rate} holds rate of connections from a client (8.13)
${msg_id} on page 834	New ${msg_id} holds Message-Id: header’s value (8.13)
${nbadrcpts} on page 837	New ${nbadrcpts} counts number of rejected recipients (8.13)
${quarantine} on page 841	New ${quarantine} holds reason envelope was quarantined (8.13)
${time} on page 846	New ${time} holds current time in seconds (8.13)
${client_rate} on page 814	New ${total_rate} holds current rate of all connections to your server (8.13)
${client_ptr} on page 813	New ${client_ptr} shows connecting client’s PTR record (8.13)