Does gmail universally block 6to4 addresses, or is there something else I am doing wrong?
Jun 07 23:32:14 www.git.icu postfix/smtp[19358]: 0695A2409C: to=< sland...@gmail.com>, orig_to=<sh...@git.icu>, relay= gmail-smtp-in.l.google.com[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 gmail-smtp-in.l.google.com[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 . Please review 550-5.7.1 https://support.google.com/mail/?p=IPv6AuthError for more information 550 5.7.1 . w38-v6si3369064qtc.330 - gsmtp (in reply to end of DATA command)) -Shawn Landden
