Postings by Shawn Landden

gmail blocking 6to4 ipv6 addresses

Does gmail universally block 6to4 addresses, or is there something else I
am doing wrong?

Jun 07 23:32:14 <a href="" title=""></a> postfix/smtp[19358]: 0695A2409C: to=<
... at gmail dot com>, orig_to=< ... at git dot icu>, relay=[2607:f8b0:400d:c08::1b]:25, delay=1.6,
delays=0.12/0.07/0.84/0.56, dsn=5.7.1, status=bounced (host[2607:f8b0:400d:c08::1b] said: 550-5.7.1
[2002:c62e:c6c6::1] Our system has detected that this message does not
550-5.7.1 meet IPv6 sending guidelines regarding PTR records and
authentication 550-5.7.1 .