Thank to all
I have tried with mail / mailx /sendmail / mutt command for mailing from command terminal, but it didn't worked . Is there any configuration or setting need for the client proxy host to send mail.

And UUENCODE is a legacy format anyway, you really want to use MIME attachments in this day and age.

uuencode is very convenient though... is there an equally convenient way to add MIME attachments? I know you can do the encoding with openssl enc -e -base64, for example, but then you have to generate the MIME headers and so-forth, right?

The FAQ has a script for properly formatting MIME attachments. The metamail package has a set of tools for base64 encoding and decoding as well as a slew of other MIME utilities (many of which are not very useful or convenient in the modern world, I have to add). The headers are not immensely complex or anything, but you do have to know a little bit about what you are doing if you construct a MIME structure by hand. The Perl MIME::Lite library is a nice front end for this, if you're into Perl.

Thanks for pointing those out. Not so complicated as you say... but I think I'll stick with uuencode since it's fairly ubiquitous.

Which MTA (mail transmission agent?) are you running... is it sendmail? If so, does mailq list a bunch of emails which are queued to be delivered?

What operating system are you using exactly? The way to correctly configure your email gateway differs from one operating system to another, and between Linux distributions.

Does "it didn't worked" mean you got command not found or that it looked like it sent a message, but you never received it? You really need to be a bit more specific.

(Annihilannic: it's Mail Transport Agent fwiw.)