nanog mailing list archives
Re: Underscores in host names
From: Tony Finch <dot () dotat at>
Date: Thu, 19 May 2005 11:57:10 +0100
On Thu, 19 May 2005, Brad Knowles wrote:
Check Guinea-Bissau for .gw. This has been a source of heartburn for many years. Any site that has a mail gateway system and uses unqualified hostnames is at risk, because mail to "fred@gw" could legitimately be interpreted two different ways, and mail could be mis-directed. I did some consulting at a major wall street trading firm that had this problem, and the only reason we ever found out that something truly bizarre was going on was because we were getting back these bounces which we couldn't explain, because we knew for sure that the user portion was legitimate. Then we started looking closer at where the bounces were actually coming from.
This reminds me of the problems with JANET-order versus Internet-order mail domains that caused some email for cl.cam.ac.uk to go via Chile. Tony. -- f.a.n.finch <dot () dotat at> http://dotat.at/ BISCAY: WEST 5 OR 6 BECOMING VARIABLE 3 OR 4. SHOWERS AT FIRST. MODERATE OR GOOD.
Current thread:
- Re: Underscores in host names, (continued)
- Re: Underscores in host names Mark Andrews (May 18)
- Re: Underscores in host names william(at)elan.net (May 18)
- Re: Underscores in host names David A. Ulevitch (May 18)
- Re: Underscores in host names william(at)elan.net (May 18)
- Re: Underscores in host names Mark Andrews (May 18)
- Re: Underscores in host names Brad Knowles (May 19)
- Message not available
- Re: Underscores in host names Jay R. Ashworth (May 19)
- Re: Underscores in host names bmanning (May 19)
- Re: Underscores in host names Brad Knowles (May 19)
- Re: Underscores in host names Brad Knowles (May 19)
- Re: Underscores in host names Tony Finch (May 19)
- Re: Underscores in host names Tony Finch (May 18)
- Re: Underscores in host names Stephane Bortzmeyer (May 18)
- Re: Underscores in host names Duane Wessels (May 18)