Official host name Option

Updated in release: 8.0.1

The  channel option specifies the "name" of the system with which this channel communicates. The  may be either a fully qualified host name, in the case of a channel dedicated to communicating with one particular system, msconfig&#x3e; show channel:l.official_host_name role.channel:l.official_host_name = host.domain.com or in the case of a more "generic" channel used for communicating with multiple systems (such as the Internet-communication channel ),  the   tends to be a generic, place-holder name, e.g., msconfig&#x3e; show channel:tcp_local.official_host_name role.channel:tcp_local.official_host_name = tcp-daemon In legacy configuration, the official host name is specified as the first name on the second line of a channel definition: tcp_local ...keywords... tcp-daemon Each channel must have its own, unique ; no  duplication with other channels is allowed. As of MS 6.1, the official host name is limited to 128 characters; in prior versions the limit was 40 characters. An official host name is required for each channel; omitting an official host name from a channel definition is an error.

Note that the  on the    channel (lowercase "L" channel) has somewhat special significance, as it is used/assumed at certain times by the MTA; and normally, it would be set to match the value of the   MTA option.

As of 8.0.1, the option if not set for a channel will default to   in Unified Configurations.

See also:
 * local_host_alias Option
 * additional_host_names Option
 * id_domain MTA Option
 * received_domain MTA Option
 * Local channel
 * ldap_local_host MTA Option
 * Typical TCPIP channels and servers
 * Channels
 * Host name channel options