> -----Original Message----- > From: [EMAIL PROTECTED] > Sent: Tuesday, May 04, 2004 12:47 AM
> Julian Mehnle <[EMAIL PROTECTED]> wrote: > > That's exactly what I meant. *Mounting* the license plate > > on the roof > > is bad, but *looking* for the license plate on the roof isn't -- if > > it's not significantly more effort. > > If it looks like a license plate it must be a license plate, > huh? What happens if it looks like a license plate on the > side, but it's different from what looks like a license plate > on the other side? How far should you go to appease people > who gratuitously fail to follow the mandated standard? There are two distinct issues here: partially and totally incorrect DNS entries. If the totality of the MX records for a given domain contain the (invalid) IP addresses, then there is strong argument against having the resolver try to guess the correct lookup for a numeric domain name (i.e that the IP address for "192.1.2.3." is 192.1.2.3). The argument that there is no numeric TLD is unconvincing, since no other part of the resolver has a clue what is, or is not, a valid domain -- that's the province of the root servers. However, there *is* a case to be made that *if* one MX record fails to resolve (for any reason) the next should be tried. And in this scenario, is there a significant difference between failure because of well-formed but missing "A" records and ill-formed ones like an apparently random strings of decimal digits? I don't have the answer... But I do think the analogy is getting a bit strained! Regards, Malc. ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
