sendmail: My unqualified host name

[Michael]

Hello.

My console is being flooded with this kind of messages:

Jun 28 15:49:02 prime sendmail[57268]: My unqualified host name 
(localhost) unknown; sleeping for retry
Jun 28 15:49:06 prime sendmail[21451]: unable to qualify my own domain 
name (localhost) -- using short name
Jun 28 15:50:02 prime sendmail[85031]: My unqualified host name 
(localhost) unknown; sleeping for retry
Jun 28 15:50:06 prime sendmail[57268]: unable to qualify my own domain 
name (localhost) -- using short name

Is there any way to find out who/what is trying to use sendmail?

M.