IPv6 tunnels [was: Re: ISP with native ipv6 in isarael]

[Shachar Shemesh]

On 26/01/2016 17:04, Tzafrir Cohen wrote: 

> On Tue, Jan 12, 2016 at 03:57:01PM +0200, Evgeniy Ginzburg wrote:
> 
>> Hi all. Do we have one or two?? Want to get rid of NAT (partially).
> 
> Off-topic, but I saw the following error today in my mail log:
> 
> dsn=5.7.1, status=bounced (host aspmx.l.google.com[2a00:1450:4013:c01::1a] said: 
> 550-5.7.1 [2001:0:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx] Our system has detected that this 550-5.7.1 message does not meet IPv6 sending guidelines regard ing PTR records
> 550-5.7.1 and authentication. Please review
> 550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error [1] for more 
> 550 5.7.1 information.
> 
> Looking further I noticed that I installed the package miredo and forgot
> about it. Perhaps I should set up a server somewhere and link my clients
> to it. Some of my requests to gmail go through it.
> 
> And on the same note: SoftLayer still doesn't provide IPV6 addresses.

I disabled IPv6 on my mail server because I just couldn't get past this
problem. Reverse lookup is fine. Domain has SPF that lists my server.
Google still won't accept my emails. 

If you solve this, please let me know how. 

Shachar 
 

Links:
------
[1] https://support.google.com/mail/?p=ipv6_authentication_error
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