Google Mail rejecting IPv6 originated mails
Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance. - Jared
Hey, as far as I remember this issue comes up once in a while since several years. There are postfix configs out there to adress this issue by sending via IPv4 to Gmail. https://tanguy.ortolo.eu/blog/article109/google-ipv6-smtp-restrictions or https://blog.hqcodeshop.fi/archives/122-Fixing-Googles-new-IPv6-mail-policy-... Hth On Thu, 23 May 2019, Jared Mauch via Outages wrote:
Date: Thu, 23 May 2019 13:31:28 From: Jared Mauch via Outages <outages@outages.org> Reply-To: Jared Mauch <jared@puck.nether.net> To: Robbie Trencheny via Outages <outages@outages.org> Subject: [outages] Google Mail rejecting IPv6 originated mails
Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.
- Jared _______________________________________________ Outages mailing list Outages@outages.org https://puck.nether.net/mailman/listinfo/outages
I since figured out that it’s people whose personal domain is forwarding to google and their server must be setup poorly, but they aren’t seeing the bounce. - Jared
On May 23, 2019, at 7:57 AM, Marlen Caemmerer <nosy@c-base.org> wrote:
Hey,
as far as I remember this issue comes up once in a while since several years. There are postfix configs out there to adress this issue by sending via IPv4 to Gmail.
https://tanguy.ortolo.eu/blog/article109/google-ipv6-smtp-restrictions or https://blog.hqcodeshop.fi/archives/122-Fixing-Googles-new-IPv6-mail-policy-...
Hth
On Thu, 23 May 2019, Jared Mauch via Outages wrote:
Date: Thu, 23 May 2019 13:31:28 From: Jared Mauch via Outages <outages@outages.org> Reply-To: Jared Mauch <jared@puck.nether.net> To: Robbie Trencheny via Outages <outages@outages.org> Subject: [outages] Google Mail rejecting IPv6 originated mails Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.
- Jared _______________________________________________ Outages mailing list Outages@outages.org https://puck.nether.net/mailman/listinfo/outages
We saw it on our commercial mail server as well as amazon aws Instances.
On May 23, 2019, at 7:59 AM, Jared Mauch via Outages <outages@outages.org> wrote:
I since figured out that it’s people whose personal domain is forwarding to google and their server must be setup poorly, but they aren’t seeing the bounce.
- Jared
On May 23, 2019, at 7:57 AM, Marlen Caemmerer <nosy@c-base.org> wrote:
Hey,
as far as I remember this issue comes up once in a while since several years. There are postfix configs out there to adress this issue by sending via IPv4 to Gmail.
https://tanguy.ortolo.eu/blog/article109/google-ipv6-smtp-restrictions or https://blog.hqcodeshop.fi/archives/122-Fixing-Googles-new-IPv6-mail-policy-...
Hth
On Thu, 23 May 2019, Jared Mauch via Outages wrote:
Date: Thu, 23 May 2019 13:31:28 From: Jared Mauch via Outages <outages@outages.org> Reply-To: Jared Mauch <jared@puck.nether.net> To: Robbie Trencheny via Outages <outages@outages.org> Subject: [outages] Google Mail rejecting IPv6 originated mails Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.
- Jared _______________________________________________ Outages mailing list Outages@outages.org https://puck.nether.net/mailman/listinfo/outages
_______________________________________________ Outages mailing list Outages@outages.org https://puck.nether.net/mailman/listinfo/outages
Hi, On Thu, May 23, 2019 at 07:31:28AM -0400, Jared Mauch via Outages wrote:
Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.
Google is fully intent on making people use IPv4 for SMTP delivery to their MXes. Lots of silly requirements that are not there on IPv4 (like, must have strong PTRs, SPF, DKIM, ...) - so, BCP today is "just deliver to Google over IPv4". gert -- "If was one thing all people took for granted, was conviction that if you feed honest figures into a computer, honest figures come out. Never doubted it myself till I met a computer with a sense of humor." Robert A. Heinlein, The Moon is a Harsh Mistress Gert Doering - Munich, Germany gert@greenie.muc.de
I don't have any problems delivering IPv6 originated e-mail to Google. I just made my IPv6 match my IPv4, which means I have IPv4 & IPv6 TXT / SPF / PTR / DMARC records where appropriate, and I sign with DKIM. Works like a champ, roughly half the mail I exchange with Google is over IPv6, the other half over IPv4 (in and out). I've never had to do the PCRE / Transport modification listed earlier in the thread. --Will On 2019/5/23 09:18 , Gert Doering via Outages wrote:
Google is fully intent on making people use IPv4 for SMTP delivery to their MXes.
Lots of silly requirements that are not there on IPv4 (like, must have strong PTRs, SPF, DKIM, ...) - so, BCP today is "just deliver to Google over IPv4".
On Thu, May 23, 2019 at 14:18 Gert Doering via Outages <outages@outages.org> wrote:
On Thu, May 23, 2019 at 07:31:28AM -0400, Jared Mauch via Outages wrote:
Anyone else having this problem? Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.
Google is fully intent on making people use IPv4 for SMTP delivery to their MXes.
Lots of silly requirements that are not there on IPv4 (like, must have strong PTRs, SPF, DKIM, ...) - so, BCP today is "just deliver to Google over IPv4".
Or phrased differently “when you turn off IPv6, it works better”. :-( Kind regards, Job
participants (6)
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Gert Doering -
Jared Mauch -
Job Snijders -
Marlen Caemmerer -
Matt Hoppes -
Will