Need help to configure sendmail

[Frank Peng]

I am using Sympatico at my home computer.

I do not have a static IP address. I update my IP
address if it is changed so you can always get my web
site at www.familywebhouse.com.

I thought sendmail should be the same as httpd. Since
I am running sendmail and listening on port 25(I can
telnet it locally), why I cannot listen to outside?
How Sympatico block this? How do they know you are
connecting me with port 25 since the name could be
resolved and you can reach this IP address?

I did not understand. Thanks a lot!

Frank Peng.



--- Zbigniew Koziol <zkoziol-Zd07PnzKK1IAvxtiuMwx3w at public.gmane.org> wrote:

> Frank Peng wrote:
> > I can telnet smtp1.sympatico.ca 25(I cannot telnet
> > anywhere else except local)
> > 
> > helo familywebhouse.com
> > 250 ...
> > mail from: frank-tWQoongPzM9NivhThqwQo9BPR1lH4CV8 at public.gmane.org
> > 250 ... ok
> > rcpt to: frank_peng_01-/E1597aS9LQAvxtiuMwx3w at public.gmane.org
> > 250 ...ok
> > data
> > 354 ok...
> > this is a message from my basement linux to yahoo
> > .
> > 250 Message received .....
> > 
> > quit
> > 
> > Then I back on to my yahoo account. I found a
> messge
> > without sender infomation but the message reads "
> this
> > is a message from my basement linux to yahoo"
> > 
> > If I send a message from yahoo to my linux box, it
> > says  relaying is not allowed. 
> > 
> > I have a MX record like this in my DNS service:
> > zone                               server
> > familywebhouse.com              smtp1.sympatico.ca
> > 
> > 
> > So this means they blocked out my sendmail?
> 
> I think so.
> 
> Where familywebhouse.com is hosted? Is it on your
> home computer? Do you 
> have a permanent IP from Sympatico ??? Arin shows me
> that IP of 
> familywebhouse.com (70.49.102.134) belongs to
> Sympatico but reverse 
> lookup to DNS gives me the name
> Ottawa-HSE-ppp4102395.sympatico.ca. I 
> can open both addresses in my web browser. I can not
> telnet you on port 
> 25. (I use istop - they do not block ports).
> 
> zb.
> 
> 
> >>If that is so, you can do nothing. Simply, I
> guess,
> >>Sympatico blocks 
> >>port 25 access from anywhere to anywhere except
> >>their own servers. You 
> >>can only use their server to send email outside.
> But
> >>why to use 
> >>Sympatico ADSL when there are so many other
> >>providers around and they do 
> >>not do these stinky restrictions? E.g.
> www.istop.com
> >>.
> >>
> >>Frank Peng wrote:
> >>
> >>>Yes. I am using Sympatico ADS and I cannot telnet
> >>>anywhere 25 except local.
> >>>
> >>>So I have to find out Sympatico's mail server
> name
> >>
> >>or
> >>
> >>>IP to put it into my DNS server's MX record,then
> >>>Sympatico forwords all email to my linux box?
> >>
> 
> 
> -- 
> Zbigniew Koziol, SoftQuake^(tm) Open Source Business
> Solutions
> Toronto, Canada, http://www.softquake.ca,
> info-lcEyp1+e+UdAFePFGvp55w at public.gmane.org
> --
> The Toronto Linux Users Group.      Meetings:
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