MTA options

A subset of the overall Messaging Server configuration options are the MTA options.

The  option enables startup of the MTA upon   startup.

The MTA uses options to provide a means of overriding the default values of various parameters that apply to the MTA as a whole. Various MTA channels also have their own channel-level options. The general MTA options have the same format as MTA channel options but are otherwise distinct ---  they apply to the MTA as a whole rather than being restricted in application to any specific channel.

In older versions of the MTA, such options were stored in the so-called MTA option file, normally named. So the MTA options are also sometimes referred to as "  options".

A variety of configuration options are controlled by MTA options. In particular, some MTA options establish sizes of the various internal, in-memory tables into which the remainder of the configuration --- the channel definitions, mapping tables, conversion entries, etc. --- are read.

Additional discussions of MTA options include:

 Legacy configuration MTA option file 

 Getting option changes to take effect on the MTA 

 Option value syntax in legacy configuration 

 MTA options, listed alphabetically 

 MTA options, listed by functional group 



See also the  Message Store option, which affects more than only Message Store files.

In contrast to MTA options, which typically modify fundamental aspects of overall MTA operation, another important category of option modifying MTA operation more specificially at the channel level is that of channel options. Note that MTA options and channel options are mostly distinct, as they mostly modify qualitatively different aspects of operation; however, there are some cases where an MTA option establishes a general default for all channels, which a channel option may then override on a per-channel basis.

See also:
 * MTA options listed alphabetically
 * MTA options listed by functional group
 * enable Option
 * Alias and address MTA options
 * Autoresponse periodicity MTA options
 * BURL MTA options
 * Configutil override MTA options
 * Conversions MTA options
 * Counters MTA options
 * Database MTA options
 * Debug MTA options
 * Direct LDAP MTA options
 * Directory location MTA options
 * DKIM MTA options
 * DNS lookup MTA options
 * Error text and error interpretation MTA options
 * External filtering context MTA options
 * File format MTA options
 * Internal size MTA options
 * LDAP external directory lookup MTA options
 * LDAP PAB MTA options
 * Mailing list and group MTA options
 * MAILSERV MTA options
 * Mapping table MTA options
 * Memcache MTA options
 * Message archival and hashing MTA options
 * Message size MTA options
 * Message tracking MTA options
 * MeterMaid MTA options
 * MLS MTA options
 * MTQP MTA options
 * Notification message MTA options
 * Password and TLS MTA options
 * Processing priority MTA options
 * Received header line MTA options
 * Redis MTA options
 * Sieve filter MTA options
 * Spamfilter MTA options
 * SPF MTA options
 * SRS MTA options
 * Syslog MTA options
 * Transaction logging MTA options
 * OpenVMS user agent MTA options
 * MTA Tailor options
 * MTA option naming in Unified Configuration
 * Legacy configuration MTA option file
 * Getting option changes to take effect on the MTA
 * Option value syntax
 * Configutil override MTA options
 * MAILSERV MTA options
 * Channel options
 * umask Store Option