[Gllug] helo ehlo lhlo

[Martin A. Brooks]

Joel Bernstein wrote:
> server greeting string - I believe ESMTP should only be attempted to
> servers which advertise it as a capability but in practice I think many
> do not follow this...

Not quite.  One feature of ESMTP is that the server will advertise what 
it's capable of doing. For example:

mute:~# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 mute.hinterlands.org ESMTP Exim 4.52 Tue, 11 Oct 2005 08:44:33 +0100
helo localhost
250 mute.hinterlands.org Hello localhost [127.0.0.1]
quit
221 mute.hinterlands.org closing connection
Connection closed by foreign host.
mute:~# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 mute.hinterlands.org ESMTP Exim 4.52 Tue, 11 Oct 2005 08:44:43 +0100
EHLO localhost
250-mute.hinterlands.org Hello localhost [127.0.0.1]
250-SIZE 52428800
250-PIPELINING
250-AUTH PLAIN LOGIN CRAM-MD5
250-STARTTLS
250 HELP
quit


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