Fedora Networking :: Automatically Send E-mail Containing IP Address?

I have several computers at work running Fedora 12. From time to time I need to remotely connect to them, usually via ssh. Each computer is assigned an IP number automatically upon startup, however due to circumstances beyond my control they are not recognized by host name by the domain server. Therefore I require the IP addresses in order to connect rather than the host names. I have no way at present to rectify this situation.

When there is a reboot, I am not always guaranteed that the IP address will be the same as before, although in practice this is usually the case. If the IP address is changed and I am logging on remotely, I am unable to connect! I can't know the number until I am again physically sitting at the computer.

As a solution, I would like each computer to e-mail me its IP address each time it boots. My first attempt was to run a script at the end of /etc/rc.d/rc.local that runs ifconfig and places the output into a file. This file is then sent to my address using sendmail. The script works fine, but I note that the output from ifconfig at this boot stage does not contain an IP address! Obviously, it is being assigned later on in the startup process. Either that or the command ifconfig does not work the same at this stage as it does once I am logged in. I require somebody with more expertise than I to comment on that.

Finally then, my question is, at what point in the startup process is an IP address assigned and the output from ifconfig would contain this address? Is there a more appropriate place rather than rc.local in which I should run my script? Is there a more appropriate command rather than ifconfig that ought to be used instead?

---------- Post added at 05:41 PM CST ---------- Previous post was at 05:30 PM CST ----------

Let me show you my attempted solution in more detail in case you're interested. The script is called .SendIP.bash and is located in my home directory. Here's what it looks like (with some censoring to protect me from public ridicule):

#!/bin/sh
# This script will send ifconfig information to my e-mail account.
# This allows me to have the latest IP address assigned to this computer.
cd /home/MyUserName
hostname > .IPmessage
date >> .IPmessage
ifconfig eth0 >> .IPmessage
sendmail -f$HOSTNAME MyAddress@MyCompany.com < .IPmessage

As I stated above, the output from ifconfig does not contain the IP address when my script is called from rc.local.