Yep, I agree, I stand corrected, I had not contemplated ISP wars or my own link going down.
And the same goes for DNS. If a DNS server responds, then accept if there is no DNS resolution of the domain, then Perm-fail it, but if the DNS server does not respond, then tempfail it, because your own (or ISPs) DNS server might be offline for a minute or so. I think that covers the original issue where non existent domains were temp-failing and they should be perm-failing. Rob :-) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Manuel Martin Sent: Friday, March 03, 2006 11:43 PM To: [email protected] Subject: [xmail] Re: Xmail 1.22 retries on 'no existing domains' email addresses ! Hello all, > Yes I agree, if there is a lookup failure it should fail immediately. > Also if the DNS lookup is ok, and Xmail cannot connect to the IP > address, it should fail immediately. on the domain-part I tend to agree, as these are 99% of the time triggered by a user's typo (and other MTAs do that, too). I understand Davide's design-decision, though, as it may be cumbersome to seperate SERVFAIL (dns-server-error, can be transient!) and NXDOMAIN (there's really no record, permanent domain-owner's configuration or user's error). But on the connect-part I must disagree... network errors are usually transient and should be treated as such (4xx). Why would someone possibly want to bounce the whole E-Mail-Queue just because my own internet-connection has a problem? Why should the users have to retry sending mail to a domain themselves if its MX goes down for say a few minutes of maintenance? Please don't remove the resilency from SMTP... :.-) Regards, Manuel Martin - 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]
