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What's my email address on a PPP connection?

Suppose I have a PPP connection to a host, and I am assigned an IP address dynamically.  Can someone send me mail to my PC via that temporary address while I am logged in?  Right now, for instance, I have been assigned the IP address 152.3.249.80.  From some other system, can someone send me mail as harlow@152.3.249.80, assuming harlow is a valid userid on my PC?

I don't have an officially assigned domain name for my machine, so that isn't an option.  I have the machine set up with the name jeh.linux.org and IP address 192.168.0.1, which (according to NET-2/3 HOWTO), is available for internal use only.

I normally receive mail at my system at work, but when I am home and using Linux, I would like to be able to forward incoming mail directly to the PC.  Any suggestions?

Justin Harlow
harlow@src.org


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Thanks!  I was able to get the temporary hostname, and found that I can indeed send to my Linux box while connected.  

The reason all this is even a problem is that my employer refuses to run a POP3 server for various security and theological reasons.  They also have a firewall that only allows dumb-terminal connections from a remote location.  As a result, I use my account at a local university as my ISP when I am working at home.  I want to get the temporary hostname from the university connection, and then forward my company mail to my remote when I am working at home.  Happily, your input helped me do it!

Thanks

JEH