Using a rbl (and spamhaus is a good one) and others tools like RDNS, = GLST, AV, anti-spam, ... is not a problem IF you take care to advertise your = users (if possible before effective deployment date) and explain them = advantages and possible problems (and how to explain problem to their contacts ... = a reference page in your site can help ...). So educated users will not ask you for this type of problems ... (or = only a few 'irreducible' ..)
At this time I don't use RDNS nor Checkmailer domain due to too many = badly configured domains, especially domains hosted on access providers in = their packages, sheep hosting providers, reducing cost to minimum so = discarding any no absolutely necessary configurations like PTR, since they are not 'forced' by smtp related rfc's to do them to function (not mandatory). I think Internet have to change definitively to a new safe mail = protocol ... In the hope SMTP that 'Simple Mail Transport Protocol' becomes 'Safe = Mail Transport Protocol' (smtp + mandatory thinks like spf, ... for example) = ;-) But problem is 'backward compatibility' and until you accept old smtp, = you don't resolve the problem definitively. Or all Internet need to switch at the same time to new protocol with no = more backward compatibility. (option is to allow mixed environment for some months, 2 years ? seems = to me good enough, then only accept new protocol) Francis > -----Message d'origine----- > De : Javier Navarro [mailto:[EMAIL PROTECTED] > Envoy=E9 : jeudi 19 mai 2005 09:44 > =C0 : xmail@xmailserver.org > Objet : [xmail] RDNS and RBLsquestion >=20 >=20 > Hi > Last days I've been using RDNS and RBL=20 > (sbl-xbl.spamhaus.org) ckecks and many of my customers had=20 > problems. Some because they couldn't receive e-mail from=20 > other ISPs that didn't configure RDNS and others because they=20 > couldn't receive mail from blacklisted IPs. >=20 > I'm having RDNS problems even with important companies here=20 > in Spain and it's dificult to explain my customers that this=20 > is caused by other's bad configuration. My customers say:=20 > "Yesterday I could recive from XXXX and now I can't. What did=20 > you changed?". And some of these important companies say they=20 > can't set a RDNS record since they host several services per IP. >=20 > I write to ask you about your experience with RDNS and=20 > RBLs. What configuration do you use? What RBL servers do you use? >=20 > Thanks, >=20 > Javier Navarro >=20 >=20 > - > 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] >=20 - 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] - 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] - 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]
