[imp] Error sending messages: sendmail returned error code 127

[Andrew Mill]

I've just setup HORDE / IMP to provide webmail services.  During 
testing, I receive an error, "sendmail returned error code 127" when 
ever I try to send a message.  The servers.php file does correctly 
reference the SMTP server for my hosting provider.  I do know that my 
provider uses qmail, instead of sendmail.  Sending messages from a 
client/server mail program (eg. Thunderbird) works fine.

Any ideas on this issue would be greatly appreciated.

Cheers

Millsy