Anand Buddhdev wrote:
>
> On Sun, May 16, 1999 at 12:24:05PM +0200, Peter van Dijk wrote:
>
> > > That server is violating RFC 1123, section 5.2.5. You can easily work
> > > around the problem by putting www.cheetahmail.com into control/helohost.
> > >
> > > (I'm considering changing the default HELO in qmail-remote in qmail 2.0
> > > to use the bracketed IP address of the client.)
> >
> > How much of a standard is that?
>
> RFC821:
>
> HELO <SP> <domain> <CRLF>
>
> <domain> ::= <element> | <element> "." <domain>
>
> <element> ::= <name> | "#" <number> | "[" <dotnum> "]"
>
> <dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
>
> <snum> ::= one, two, or three digits representing a decimal
> integer value in the range 0 through 255
>
> Therefore,
>
> HELO [199.103.176.41]
But so does:
HELO [199.103.176.41].#394875.spoon.[100.164.68.209]
Is there a reason for that, or is it just underspecified?
