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<<TableOfContents()>>

== whois ==
{{{
For direct mail, the domain in the sender's From: header must be aligned 
with either the SPF domain or the DKIM domain. 
This is required to pass DMARC alignment.
}}}

SPF domain と一致させるのはかなり困難。

DKIM domain であれば一致は容易。

== history ==
{{{

}}}
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