I would not point the MX record for your dynamic domain name (or any other domain name) at your ISP's server. The mail will almost certainly be rejected.

Adam McCarthy wrote:
So would I just tell no-ip.org (seperate from DynDNS as fair as I
know, but they also have MX records.), to just put in my address or
would I just throw in my ISP's SMTP server?

On Fri, Sep 19, 2008 at 4:12 PM, J.P. Trosclair
<[EMAIL PROTECTED]> wrote:
I think DynDNS.com (the folks who have no-ip.org right?) have an option to
setup a MX record for dynamic host names. You'll more than likely want to
enable this unless you have a reason not to.

Basic setup for accepting and sending mail with your ddns hostname:

mydomain = mymachine.no-ip.org
myhostname = $mydomain
myorigin = $mydomain
mydestination = $mydomain

Problems to consider:
1. Your ISP may block smtp traffic from you to any other server except their
very own smtp servers. This is pretty common from what I've seen.
2. Some servers may reject your mail if you do not have a valid PTR record
for your IP address. By default your ISP will probably have one, but it
won't resolve to mymachine.no-ip.org which may cause the delivery problem
mentioned before.


J.P.

Adam McCarthy wrote:
I have looked for a guide on the Internet on how to do this but I have
never found one.

I am wishing to run a request tracker (RT) and need postfix.

Now I already have the email coming in, sent to RT by fetch mail of a
gmail account.

Now how can I make it so that postfix sends replies and other stuff
back to the users that will work with me having either just an IP for
my postfix or my DNS.

I guess to sum it all up, how can I use postfix with just an IP or a
DNS that just translates to my IP though I can't do stuff like add on
to the DNS like mail.mymachine.no-ip.org.


--
J.P. Trosclair
Systems Administrator
Jude & Jude, PLLC
Phone: (601) 579-8411
Fax: (601) 579-8461

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