I'm trying to set up sendmail so I can receive e-mail directly, in addition to using my isp supplied e-mail.
My biggest concern is that I don't want people on the internet to be able to use my smtp server as a means to send mail to people with the result making it look like it me... I think that's called "relaying"...
No books necessary. My apologies for taking so long to respond, and I've seen that others responded earlier so hopefully this is still useful to you. I have written instructions for how to configure sendmail to accept mail from the outside and protect you from unauthorized relaying. I believe those instructions are pretty complete and pretty accurate, and about 200 people a month read them (given October and November stats):
http://www.simpaticus.com/linux/sendmail-smtp-auth-howto.html
Please let me know if you find those useful, and if there is anything else you would like them to include. I am already working on the next revision, which will show in a little more detail the difference between steps in various operating systems, and also how to setup a POP3/IMAP server package so that people can check mail as well. Note that checking mail is a ridiculously easy thing, but some people still ask that it specifically be included.
Feedback, comments, suggestions, questions... all welcome.
-- Rodolfo J. Paiz rpaiz@xxxxxxxxxxxxxx http://www.simpaticus.com
