nanog mailing list archives
Re: mail does bounce (was: Customers down?)
From: Sean Donelan <sean () donelan com>
Date: 2 Jan 2000 14:54:48 -0800
On Sun, 02 January 2000, Owen DeLong wrote:
I'll take a stab at this: Attempting to resolve a.b.c.d.e.f.g.h.i If you get back a return value from DNS that says "Authoritative answer, a.b.c.d.e.f.g.h.i does not exist" Bounce the mail. If you get back a return that says "Resolving a.b.c.d.e.f.g.h.i timed out without a return" Queue the mail. This also works for i, h.i, g.h.i, f.g.h.i, etc.
I'm happy to agree this is a very sensible thing to do. However, there is no requirement for any mailer to do it. Some mailers may, but other mailers may not. So it is not very wise to assume all mailers work the same as yours. There is a written recommendation that domains should have DNS servers on seperate networks. There is no such recommendation that mailers retry or queue mail when they can't reach DNS servers.
Current thread:
- RE: mail does bounce (was: Customers down?) Sean Donelan (Jan 01)
- <Possible follow-ups>
- Re: mail does bounce (was: Customers down?) Sean Donelan (Jan 01)
- Re: mail does bounce (was: Customers down?) jlewis (Jan 01)
- Re: mail does bounce (was: Customers down?) Sean Donelan (Jan 01)
- RE: mail does bounce (was: Customers down?) Owen DeLong (Jan 02)
- Re: mail does bounce (was: Customers down?) Owen DeLong (Jan 02)
- Re: mail does bounce (was: Customers down?) Christian Kuhtz (Jan 02)
- Re: mail does bounce (was: Customers down?) I Am Not An Isp (Jan 02)
- Re: mail does bounce (was: Customers down?) Christian Kuhtz (Jan 02)
- Re: mail does bounce (was: Customers down?) Sean Donelan (Jan 02)
- Re: mail does bounce (was: Customers down?) Owen DeLong (Jan 02)
- Re: mail does bounce (was: Customers down?) Owen DeLong (Jan 02)
- Re: mail does bounce (was: Customers down?) Sean Donelan (Jan 02)