On Mon, 28 Mar 2005, Alex Dean wrote:
> My problem now is email. I don't get it. As in : I can neither send
> nor receive email, and I don't understand enough about it to know how to
> troubleshoot. Here's a list I brainstormed of possible problems -
> anyone who could help either add to the list or suggest possible
> tests/solutions would be my hero.
>
> * mail server is not running.
> * mail server is running, but incorrectly configured
Listening on public interface? Use netstat -an (or lsof) to see that it is
running on port 25 of your public interface.
> * server is not open on the correct ports for email
> I'm open on 25 (SMTP) and 110 (POP). Isn't that enough?
> * my ISP is blocking me in some way, because i have a residential
> account rather than a commercial account
> How could I test this?
Ask someone to try to connect to it. I can't connect to your box on port
25. (Port 80 works good though.)
I'd guess it is firewalled.
> * my DNS is set up incorrectly
> I'm using everydns.org for DNS. It's working fine for web
> traffic. Here's the only MX record I have set up.
> deanspot.org
>
> MX
>
> deanspot.org
>
> 10
>
> 3600
>
>
> I am running exim4, and have done some basic configuration. I think I'm
> also running Courier, but I don't really undertstand the
> difference/relationship between exim and Courier. Help?
Exim is a mail transfer agent (doing SMTP) and delivery agent. Courier is
a mail retrieval agent (IMAP). Exim sends and receives mails. Courier
(IMAP) allows your users to grab their emails from their mailboxes
(maildirs).
> Could suggest a basic book on the fundamentals of email? I've looked
> online, and in bookstores, but I haven't found anything which seems to
> fit this bill.
I am not sure.
I think O'Reilly has one book on IMAP. And Philip Hazel has two books on
Exim. Also Philip Hazel has great documentation included with his Exim
which could be printed out.
(I am interested in writing a POP3 book, but financially it is not worth
it since I'd guess very few would buy it.)
Jeremy C. Reed
technical support & remote administration
http://www.pugetsoundtechnology.com/
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