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.