nanog mailing list archives
Re: why IPv6 isn't ready for prime time, SMTP edition
From: "John Levine" <johnl () iecc com>
Date: 25 Mar 2014 17:56:03 -0000
In article <5331C054.8040801 () 2mbit com> you write:
On 3/25/14, 11:23 AM, John Levine wrote:Large mail providers all agree that v6 senders need to follow good mail discipline, but are far from agreeing what that means. It certainly means proper rDNS, but does it mean SPF? DKIM on all the mail? TLS on the connections? At this point, I don't know and neither does anyone else. Fortunately we have at least another decade of full IPv4 mail connectivity to figure it out.So, what's everyone's feelings about a rather large provider who blocks IPv6 e-mail that has no RDNS, even though the sending domain has SPF records allowing the block, and proper DKIM set up? *looks directly at Google*
I think this would be a good time to fix your mail server setup. You're never going to get much v6 mail delivered without rDNS, because receivers won't even look at your mail to see if it's authenticated. CenturyLink is reasonably technically clued so it shouldn't be impossible to get them to fix it. R's, John
Current thread:
- RE: misunderstanding scale, (continued)
- Message not available
- RE: misunderstanding scale Naslund, Steve (Mar 24)
- Re: misunderstanding scale hslabbert (Mar 24)
- Re: misunderstanding scale Owen DeLong (Mar 24)
- RE: misunderstanding scale Naslund, Steve (Mar 24)
- Re: misunderstanding scale Valdis . Kletnieks (Mar 24)
- RE: misunderstanding scale Alexander Lopez (Mar 24)
- Re: misunderstanding scale hslabbert (Mar 24)
- Re: why IPv6 isn't ready for prime time, SMTP edition John Levine (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Brielle Bruns (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Jim Popovitch (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition John Levine (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Brielle Bruns (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Paul Ferguson (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Elizabeth Zwicky (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Paul Ferguson (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Laszlo Hanyecz (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Jim Popovitch (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Brielle Bruns (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Tony Finch (Mar 26)
- Re: why IPv6 isn't ready for prime time, SMTP edition John Levine (Mar 25)
- Re: why IPv6 isn't ready for prime time, SMTP edition Rich Kulawiec (Mar 25)