I have a VPS with only 128mb of memory.

I want a form email on my blog, so people can send messages to my main email, which I would like to keep hidden.

I do not want anything more. I don't want to store email on my VPS. I don't want to relay email. I don't want anybody sending email to my blog site. The email only needs to go to one site. And from only one account.

I want something as simple as possible to configure, and something that uses the smallest amount of hdd space, and especially the smallest amount of memory.

I am using debian etch on my VPS. I'm guessing exim4 is my best bet.

If anybody knows of a tutorial to get me started, that would be great.

http://koivi.com/exim4-config/
... exim4 tutorial.

http://www.hypexr.org/linux_mail_server.php
... general smtp