how to setup mail server to use (Yahoo|Gmail) smtp servers

["H.S." <hs.samix@gmail.com>]

Hello,

I am tying to see which mail server to install so that I can send emails
via scripts using Gmail (preferable) or Yahoo smtp servers.

I haven't setup email servers yet. Which one I go for (on Debian and
Ubuntu)? Exim4, postfix, or perhaps msmtp? The last one I learned from here:
http://phosphorusandlime.blogspot.com/2008/05/ubuntu-command-line-email.html

If people have done this kind of stuff before, any insights or points I
should keep in mind? The objective is to send emails unattended via scripts.

Thanks.

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