smtp check

This is what the conversation looks like when I run telnet:

# telnet xxx.xxx.xxx.xxx 25
Trying...
Connected to xxx.xxx.xxx.xxx.
Escape character is 'ÜÅ'.
ehlo
220-Welcome to mailserver.domain.tld
220 mailserver.domain.tld (NT0234.04.fdc0aadd) ready for ESMTP transfer
501 Hostname expected.
quit
221 Goodbye Ä62.119.162.107Å
Connection closed by foreign host.

Regards
Lars


----- Original Message ----- 
From: "lars ebeling" <user-1fecd3eafd52@xymon.invalid>
To: <user-ae9b8668bcde@xymon.invalid>
Sent: Thursday, December 01, 2005 1:34 PM
Subject: Re: [hobbit] smtp check

Perhaps the mailserver neeed a Helo/ehlo first?

This is what I have in my bb.services:

[smtp]
  send "ehlo\r\nquit\r\n"
  expect "220"
  options banner
  port 25

Regards
Lars


----- Original Message ----- 
From: "Stef Coene" <user-dbffe946c0f4@xymon.invalid>
To: <user-ae9b8668bcde@xymon.invalid>
Sent: Thursday, December 01, 2005 10:12 AM
Subject: [hobbit] smtp check

Hi,

I get this when I check a smtp server:
Address=195.86.128.62:25, open=1, res=0, err=0, connecttime=0.002863,
totaltime=1.153169, banner='501 Syntax error in parameters or arguments
' (45 bytes)

Other smtp servers are working fine.  This is the smtp server of the ISP.

How can I find out what the exact conversation is between my hobbit 
server and
the smtp server ?

Stef