need help with exim4 and mail transfer

Steve smorrey at
Tue Nov 20 23:17:53 MST 2007

It all depends on how you plan to use the system.
I've always found it to be a pain in the butt to have more than 2 or
at most 3 partitions on a drive.
My partitions usually consist of


I leave /boot unmounted unless updating the kernel, which prevents a
lot of accidents, but truthfully I haven't bothered doing that in a
long while.

Unless you have a specific reason to need the multi-partition setup, I
highly recommend you avoid it.

As for how DynDNS works, it's pretty simple.

Comast gives you a dynamic IP address, not a static one.
Periodically Comcast (and pretty much any other ISP) will reclaim all
outstanding IP addresses and redistribute them.
Internet services such as DNS require a static and unchanging IP
address to function properly.

This is where DynDNS and other Dynamic DNS services come in.
As soon as your IP address has changed, your DynDNS client (could be a
program on your computer or it could be built into the router),
notifies the DynDNS service that your IP address has changed.  DynDNS
then updates their records to reflect that, and from then on out will
let anyone wanting to know where is, exactly what
the new IP address is.

All you need are 3 things.
You need to set up a DynDNS account.
You need to set DynDNS as your nameserver at your registrar.
You need to install and setup a DynDNS client (that's optional since
they do have a web interface if you want/need to do it by hand).

I hope this was helpful.


On Nov 20, 2007 6:45 PM, Dr. Scott S. Jones <scott at> wrote:
> +++ Steve [20/11/07 17:54 -0700]:
> > >From somewhere outside your LAN try to telnet to port 25 and see if
> > it's blocked.
> > Other than that make sure your ISP hasn't decided to simply not route.
> > Also check that MX records with your DNS provider are correct.
> > By the way did you ever replace that router that was starting to flake?
> >
> I am so ignorant, or absent minded.
> I got a new router, WRTP54G, and installed it early this morning.
> In the process, I forgot to remember that in powering down my modem, and
> router, Comcast gave me a new IP address. Once I went to my registrar, for
> domain, and updated the IP there, the email started working
> again.
> I have a dyndns account...but am still confused about how that all works.
> Is that the way to avoid problems when comcast happens to change my IP
> address?
> I have tried to use gparted to expand my / drive on my etch machine (the one
> under my monitor) and it lets me shrink or expand partitions within the
> extended partition, but doesn't allow me to MOVE those partitions. I want to
> free up space, then move the partitions to the right, to give room to the /
> partition so I can expand it, but the option to expand space before the
> existing partitions is greyed out.
> Anyway, I am tempted to just reformat this etch system...and set up my
> partitions with more space. Do you have any recommendations for how to carve
> up a new drive, i.e., how much space for /, /home, /usr, /var, et al?
> Thanks for your reply to this.
> Scott
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