> -----Message d'origine----- > De : Gustavo Galvan [mailto:[EMAIL PROTECTED] > Envoy=E9 : mardi 3 f=E9vrier 2004 01:26 > =C0 : [EMAIL PROTECTED] > Objet : [xmail] Re: validating email address - idea 2 >=20 >=20 >=20 > That's the point. So, I think we need check if IP Address of=20 > incomming SM=3D > TP=3D20 > connection corresponds with domain extracted from MAIL FROM.=20 > This IP Addr=3D > ess=3D20 > must have a record (A or CNAME) in the DNS of that domain. >=20 >=20 > Gustavo >=20
This is not good since many domains don't allways have complete A or = cname records for all of they sending computers (mta ou mua) ... Remember many legitimate mail can come indirectly from firewalls and = proxies shared by customers at isp level, and the isp don't allways add a = record for each domain handled by the firewall ... so you test will fail !! Francis - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
