[spf-discuss] Re: How does one distinguish between authorizing MAIL FRO

> > > > > "Don" == Don Lee
> > > > > "Re: Re: How does one distinguish between authorizing MAIL FROM and HELO"
> > > > >  Mon, 29 Jan 2007 10:54:28 -0600
    Don> If I may simplify - is this pointing out that mailservers
    Don> that host many domains probably use a single HELO?  If so,
    Don> this is true of my server.  I host about 50 domains, and my
    Don> mailserver always says "HELO mailhost.icompute.com".  HELO
    Don> checking that demands that the MAIL FROM match HELO will
    Don> usually fail on mail from my server.

    Don> I believe that the HELO must be FQDN, but there is no
    Don> requirement that it match MAIL FROM.

As I understand what Alex pointed out, it is the IP originating the
TCP connection that must match the SPF identities.

        jam

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