MAILSERV MTA options

RESTRICTED. MAILSERV is not yet fully implemented.

See also:
 * MAILSERV moderator MTA options
 * MAILSERV LDAP schema MTA options
 * MAILSERV user LDAP attribute name MTA options
 * MAILSERV list subscription LDAP attribute name MTA options
 * MAILSERV list LDAP attribute name MTA options
 * MTA options