how can I set the "from:" field when using the mail linux command

[Steve Stavropoulos]

On Tue, 1 Mar 2005, Michael Iatrou wrote:

> <wild guess>
> Μήπως το στοιχειώδες:
> 
>     $ cat some_file | mail -r foo at bar.gr kapios at hol.gr
> 
> σου κάνει;
> </wild guess>
> 

 Kala, pou thn brhkes thn option -r sto mail(1)?