three_jeeps a écrit :
> I am looking for some pointers on how to set up postfix as a mail server.
> I am running ubuntu 8.04 server. I use DynDns free web host redirects - my
> domain is
> foo.homeunix.com, my isp (comcast) is 18.104.22.168 (fictious address), my
> ubuntu server has a
> static ip address of 192.168.0.100 and behind a cable modem router.
the "internal" IP (192.168....) doesn't matter. does your provider
"promiss" a static external IP?
if not, imagine what happens if your IP is allocated to someonelse: your
mail will go to a bad place.
> I have configured my dynamic DNS host as a record ponted to an IP address to
> map my local server IP
> address to the comcast ISP address. (I run apache2 and http requests work
> Question: Is this configuration sufficient to allow postscript on my serve
I guess: s/postscript/postfix...
> to operate as a mail server
> (when properly configured?) I assume for postfix config my FQDN is
> If not, what needs to be done? DynDns also has a service that sets the MX
> records for my host.
> Question: Do I need to configure the MX records for my host to make it email
> routing work?
if you want to receive mail for example.com, then you set up an MX for
example.com. it's about mail to joe@...
. it's not about the name
of your machine.
> Question: Assuming the above is sufficient (and if necessary MX records
> configured), is there a guide that
> will explain how to configure postfix as an outbound only server?
check www.postfix.org. click on "documentation" and follow the links. in
null client and firewall setups should help you...
> Alternative approach: If I want to configure Postfix as an outbound only
> server, relaying through my
> gmail account, how can this be done?
that will certainly be better for "deliverability", but you need to
setup smtp SASL (client side):
> Is the above configuration through
> DynDns sufficient? if not,
> what is missing.
dyndns can do nothing about your reverse dns. your ISP decides what your
PTR is. if it looks "suspicious", you'll have deliverability problems.
a comcast origin isn't the best thing you can have:)
so, go for the gmail approach. the good thing is that it should force
you to learn more about smtp (in particular, SASL setup), which you