> > 220 localhost.localdomain ESMTP Sendmail 8.12.11/8.12.11; Fri, 25 Feb 2005 > > 07:55:26 -0800 > > helo > > 501 5.0.0 helo requires domain address > > > > Ooo, that's not a good example. Sendmail is well known for trying to > _create_ the standard, rather than complying with one. Anyone want to > test Postfix?
helo 401 Syntax: HELO hostname
