I'am new in system administration, and I would like to send file from my UNIX machine running on Aix 4.3.3 to the Lotus Notes V5 mail of my colleagues .
So I heard about the sendmail command, but I don't know excatly how to use it for send my files .
Are you wanting to do this via an automated process or from the console?
If you are wanting to do this from the console then I would suggest pine. It might even be installed by default. It supports attaching items to outbound mail.