receive e-mail with postfix (blocked by....?)

David Fletcher dave at
Tue Dec 31 16:11:28 UTC 2013

On Tue, 2013-12-31 at 03:07 +0000, thufir wrote:
> On Tue, 31 Dec 2013 02:13:46 +0000, emilianovazquez wrote:
> > -Thufir, if your aren't the owner of the domain you can't use this
> > domain to receive mail. Maybe you can send mails but this is another
> > question and in most cases you will be marked as spam because of this.
> > 
> > Create another domain and use this to get your mail working.
> > 
> > If you can't use port 25 TCP you're stuck. This port is for receive
> > mails from outside and always need to be fordwarded to postfix. This is
> > the only way to do this.
> Ok, so without port 25 I'm stuck.  I absolutely appreciate your clarity.
> Just to be clear, the FQDN **is** mine, it's registered 
> with but they keep and let users register 
> subdomains.  There's even an option to fill out an mx form, so their 
> intent is clear -- it's ok to do this.  Just not ok with my ISP.

I use one of those, too - the one, but in no way do I consider
that I "own" it. no-ip owns the domain, and just allows me to add a
subdomain to it for forwarding packets to my dynamic IP address, so long
as I confirm that I still want to continue to use it at least every 30

The no-ip subdomain is what I pointed my mx record to, so that the no-ip
client I compiled on my server keeps my IP address updated, so that any
email that gets sent to anybody at gets fired at my
router, which then port forwards it to the server in my LAN. postfix
then uses my aliases table to sort email into the correct inbox, and we
get our email.


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