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North American Network Operators Group

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RE: IETF SMTP Working Group Proposal at

  • From: Brad Knowles
  • Date: Wed Aug 21 19:57:44 2002

At 7:13 PM -0400 2002/08/21, Robert Blayzor wrote:

 Right, but to run a "real mail server" you need a static address.  Which
 can be registered as a valid mail server.  Dynamic IP's cannot.
Sure they can. For sending e-mail, all you need is an IP address. It would help if the reverse DNS is set up correctly, and that you claim this same name in the SMTP dialog, but this isn't required.

For receiving mail, all you need is a domain name, which has a set of advertised MXes. Those MXes could point to mail servers operated by friends of yours who might use UUCP, or some private routing method to send your mail to whatever your current IP address is. Those MXes could even point to your own host/domain names, and the mail would be deferred until such time as you re-connect with your dynamic DNS provider and update the IP addresses for these names.

Works just fine.

Brad Knowles, <>

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.

GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E W+++(--) N+ !w---
O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++)
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