mutt usage

I want to use mutt in order to send some files as attached files using the mutt pogram.

I've tried:

mutt -s "Some Subject" -a file1 -a file2 panos1962@gmail.com <message

to send the contents of "message" file as the main mail message, and the files "file1" and "file2" as attached files.

That comman is working well in CentOS, but in a new Ubuntu doesn't send any message to the specified address.

Any ideas?

IS email running on the new box?