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<p>I don't have any problems delivering IPv6 originated e-mail to
Google. <br>
</p>
<p>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. <br>
</p>
<p>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. <br>
</p>
<p>--Will</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 2019/5/23 09:18 , Gert Doering via
Outages wrote:<br>
</div>
<blockquote type="cite"
cite="mid:20190523141808.GE1097@greenie.muc.de">
<pre class="moz-quote-pre" wrap="">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".
</pre>
</blockquote>
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