In <127201286(_dot_)20040321085311(_at_)brandenburg(_dot_)com> Dave Crocker
<dhc(_at_)dcrocker(_dot_)net> writes:
AD> The standard [RFC821] was written at a time when there were
AD> certain unspoken expectations, and those were carried into RFC
AD> 2821:
[I unsnipped the above]
AD> - MTA's are MTA's for one domain
not really. ISPs that support customer-specific domain names have MTAs
that service many domains.
There were ISPs when RFC821 was written? My memory is a little fuzzy,
but I didn't think the term "ISP" was even invented until the
late-80s/early-90s.
-wayne