[Nagiosplug-devel] bugfix: check_smtp on MS exchange 2K servers
sghosh at sghosh.org
Sun Sep 1 09:03:21 CEST 2002
> On Sun, 1 Sep 2002, Reinier F. Kleipool wrote:
> > Hello developers,
> > I had some trouble with check_smtp against a Microsoft Exchnage 2000
> > server. The plugin checked ALL my mailservers, except MS ex2K. I solved this
> > by changing the SMTP_DUMMYCMD to the following definition:
> > #define SMTP_DUMMYCMD "HELO nagios\r\nMAIL from:nagios at localhost\r\n"
> > It turn out that *^%^# exchange 2K needs a valid HELO and MAIL command AND
> > the \r 's to reply. If you don't, the read from the socket waits for ever,
> > and times out. this returns a critical to nagios. This change does not break
> > the checks with my other mailservers: sendmail and MS exchange 5.5..
> > Hope this helps....
> > Kind regards,
> > Reinier Kleipool
The current CVS version does just what you have said, but slightly
SMTP_HELO is concatenated with the local hostname and "\r\n" to create the
For the MAIL command - rfc 821 allows the presence of a NULL reverse path
(see ex 7) - does Exchange 2k complain about a null reverse path?
SMTP_DUMMYCMD = "MAIL FROM:<> \r\n"
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