Sendmail on a LAN

Craig White craigwhite at
Tue Aug 17 23:56:51 UTC 2010

On Tue, 2010-08-17 at 16:50 -0700, JD wrote:
> On 08/17/2010 04:35 PM, Gordon Messmer wrote:
> > On 08/17/2010 02:28 PM, JD wrote:
> >> So, why would any mail client/server send an email message
> >> to my ip address on a port other than 25?
> > They never would.
> >
> >> Seems that I would need to configure the dydns account to
> >> forward the email to me on that alternate port, no?
> > Yes.  I merely meant that if you configured the firewall to direct port
> > 8025 to your sendmail server's port 25, you wouldn't have to take the
> > step of reconfiguring sendmail.  You'd only need to set up an external
> > MX at DynDNS, configure your dns MX record to point to their servers,
> > and configure your router to forward the appropriate port.  No small
> > configuration, but one that doesn't modify sendmail.
> >
> > On the other hand, if your ATT firewall's configuration is simply to
> > forward all ports, then you *would* have to modify sendmail.  I normally
> > don't do that.  I forward only specific ports, and most firewall will
> > allow you to set the destination port to something other than the original.
> This router does not provide for a port to forward to.
> It only provides for forwarding a port or range of ports
> to a lan ip address.
> As I said, it is a crappy router.
that's all you need


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