…s specification defines a mailbox name, that host must have an MX RR set (see [ RFC974 ]) and the mail exchangers specified by this RR set must recognize the referenced host's domain name as "local" for the purpose of accepting mail bound for the defined mailbox name. Note that t…

…s specification defines a mailbox name, that host must have an MX RR set (see [ RFC974 ]) and the mail exchangers specified by this RR set must recognize the referenced host's domain name as "local" for the purpose of accepting mail bound for the defined mailbox name. Note that t…