March 26, 2008
12:05 p.m.
On Tue, March 25, 2008 2:33 am, Julian Mehnle wrote:
You can however safely send a DSN if an SPF[1] check for the incoming message passes.
That's not "safe" but perhaps "safer". But a lot of sites can't use SPF so they either don't use it, or use soft-fail. I would only trust SPF results from explicit matches and PASS.
-- Jo Rhett Network/Software Engineer Net Consonance