Running mutt with Cygwin under Windows Server 2003: child exited 127

Hi all,

I already made a few installations of cygwin on Windows (NT, XP and
2000) and it was no problem to configure mutt to use ssmtp for sending
mail.

However I am failing on Windows Server 2003.

The error I am getting is:

$ echo hallo | mutt -s new_test deboerge@ch.schindler.com
Error sending message, child exited 127 (Exec error.).
Could not send the message.

On my XP machine it even runs without local .muttrc, but to be sure I
created the .muttrc with following content:

set sendmail="/usr/sbin/ssmtp"

Within mutt I can see that this setting is activated with ':set
?sendmail'.

Again, it all works on my XP PC, but it does not on the Windows Server
2003.

I made no change to /etc/Muttrc that is installed by Cygwin.

ssmtp seems to work, I can send myself an empty mail with it.

I also looked into the workings of windows with the filemonitor of
sysinternals, and it seems that ssmtp is never really called, there is
no entry of it. But I cannot find out if ssmtp is really not called by
mutt, or that Windows 2003 somehow blocks the call to ssmtp.

I am using the following versions:

ssmtp 2.60.4
mutt 1.4.1
CYGWIN_NT 5.1

There is a suggestion of a Windows expert that Windows Server 2003 is
has more restrictive permissions then the other Windows'. I changed
the permissions for ssmtp and mutt so that al users may 'read and
execute', but it made no difference.

Could somebody help me finding out what is going wrong?

Thanks in advance,

Gert