This FEATURE(relay_based_on_MX) reverses that policy. This feature, how it is used, and how
it fits into relaying and spam handling are explained in ?§7.4.4 on page 271.
17.8.47 FEATURE(relay_entire_domain)
Relay based on $=m V8.9 and later
Ordinarily, only hosts listed with RELAY_DOMAIN (?§7.4.1.1 on page 269) are allowed to
relay through the local machine. This FEATURE(relay_entire_domain) allows domains listed
in the $=m class to also be relayed, including any hosts that end in any of the domains listed
in the $=m class. This feature, how it is used, and how it fits into relaying and spam
handling are explained in ?§7.4.5 on page 272.
17.8.48 FEATURE(relay_hosts_only)
Relay individual hosts, not domains V8.9 and later
Ordinarily, the names listed with RELAY_DOMAIN (those allowed to relay through the
local machine, ?§7.4.1.1 on page 269) are names of domains. By declaring this
FEATURE(relay_hosts_only), you cause the names in that list to be interpreted as the names
of hosts, not domains. This feature, how it is used, and how it fits into relaying and spam
handling are explained in ?§7.4.6 on page 273.
17.8.49 FEATURE(relay_local_from)
Relay based on MAIL From: V8.9 and later
Ordinarily, permission to relay is not based on the SMTP MAIL From: command. This
feature changes that behavior. How it is used and how it fits into relaying and spam
handling are explained in ?§7.
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