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List:       postfix-users
Subject:    Re: Google rejecting IPv6 mails
From:       Andreas Herrmann <sma () physik ! tu-berlin ! de>
Date:       2013-10-10 12:55:08
Message-ID: 5256A3AC.7010203 () physik ! tu-berlin ! de
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Hi there,

On 10/01/13 07:07, Luigi Rosa wrote:
> <{google_recipient}>: host aspmx.l.google.com[2a00:1450:4001:c02::1b] said:
>     550-5.7.1 [2a01:4f8:d16:2409::badd:ecaf       1] Our system has detected an
>     550-5.7.1 unusual rate of unsolicited mail originating from your IP
>     address. To 550-5.7.1 protect our users from spam, mail sent from your IP
>     address has been 550-5.7.1 blocked. Please visit
>     http://www.google.com/mail/help/bulk_mail.html 550 5.7.1 to review our Bulk
>     Email Senders Guidelines. h46si16725451eex.133 - gsmtp (in reply to end of
>     DATA command)
> 
> Needless to say, that if I use IPv4 Google accepts every mail.
> 
> Dis this happened to anyone else?

as reported I have the same problem and working with the "solution" to
only send over IPv4 to Google. I have correct DNS seetings including PTR
and SPF and I'm able to send to MTAs with really strict checking over IPv6

<***@gmail.com>: host gmail-smtp-in.l.google.com[2a00:1450:4001:c02::1a]
    said: 550-5.7.1 [2a01:4f8:d16:4114:feed:1bad:beef:dead       1] Our
system
    has 550-5.7.1 detected an unusual rate of unsolicited mail
originating from
    your IP 550-5.7.1 address [...]

Just an idea:
Google is blocking the complete 2a01:4f8::/32AS24940
(HETZNER-RZ-NBG-IPV6-BLK1) and doesn't care abut seperate subnets like
Luigi's 2a01:4f8:d16:2409::/64 or my 2a01:4f8:d16:4114::/64 :-(

	Andreas


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