nanog mailing list archives
Re: The Reg does 240/4
From: "John Levine" <johnl () iecc com>
Date: 16 Feb 2024 15:03:07 -0500
It appears that Mike Hammett <nanog () ics-il net> said:
-=-=-=-=-=- " Does any IPv6 enabled ISP provide PTR records for mail servers?" I think people will conflate doing so at ISP-scale and doing so at residential hobbiyst scale (and everything in between). One would expect differences in outcomes of attempting PTR records in DIA vs. broadband.
Most consumer ISPs block port 25 so rDNS would be the least of your problems trying to run a home mail server.
"How does Google handle mail from an IPv6 server?" A few people have posted that it works for them, but unless it has changed recently, per conversations on the mailop mailing list, Google does not treat IPv6 and IPv4 mail the same and that causes non-null issues.
As has been widely reported, Google has recently tightened up authentication requirements so v4 and v6 are now pretty similar. They won't accept v6 mail that isn't authenticated with SPF or DKIM but honestly, if you can't figure out how to publish an SPF record you shouldn't try to run a mail server. R's, John
Current thread:
- Re: The Reg does 240/4, (continued)
- Re: The Reg does 240/4 Christopher Hawker (Feb 14)
- Re: The Reg does 240/4 Tom Samplonius (Feb 14)
- Re: The Reg does 240/4 Stephen Satchell (Feb 14)
- Re: mail and IPv6, not The Reg does 240/4 John Levine (Feb 14)
- Re: The Reg does 240/4 Mark Andrews (Feb 14)
- Re: The Reg does 240/4 Lyndon Nerenberg (VE7TFX/VE6BBM) (Feb 15)
- Re: The Reg does 240/4 Owen DeLong via NANOG (Feb 15)
- Re: mail and IPv6, not The Reg does 240/4 Tim Howe (Feb 15)
- Re: The Reg does 240/4 Mike Hammett (Feb 16)
- RE: The Reg does 240/4 Brotman, Alex via NANOG (Feb 16)
- Re: The Reg does 240/4 John Levine (Feb 16)
- Re: The Reg does 240/4 Owen DeLong via NANOG (Feb 17)
- Re: The Reg does 240/4 Michael Thomas (Feb 17)
- Re: IPv6 mail The Reg does 240/4 John Levine (Feb 17)
- Re: IPv6 mail The Reg does 240/4 Michael Thomas (Feb 17)
- Re: The Reg does 240/4 Tom Beecher (Feb 14)
- Re: The Reg does 240/4 Owen DeLong via NANOG (Feb 15)
- Re: The Reg does 240/4 Christopher Hawker (Feb 15)
- Re: The Reg does 240/4 Owen DeLong via NANOG (Feb 15)
- Re: The Reg does 240/4 Lyndon Nerenberg (VE7TFX/VE6BBM) (Feb 15)
- Re: The Reg does 240/4 William Herrin (Feb 15)