How to keep postfix from using ip6

Been getting emails bounced from google for IP6 reasons. I dont use ip6 for anything right now, so is there a way to tell it not to use it or do i have to completely shut off ip6 on the pbx?

From the mail log[2607:f8b0:4023:c06::1a]:25, delay=1.2, delays=0.24/0.05/0.36/0.61, dsn=5.7.1, status=bounced (host[2607:f8b0:4023:c06::1a] said: 550-5.7.1 [2001:19f0:ac01:e7e:5400:4ff:fe14:ff9d] Our system has detected that 550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR 550-5.7.1 records and authentication. Please review 550-5.7.1 Prevent mail to Gmail users from being blocked or sent to spam - Gmail Help for more information 550 5.7.1 . y2-20020aa79e02000000b0063b7790fde1si5030994pfq.284 - gsmtp (in reply to end of DATA command))

**edit: I went into /etc/postfix/ and changed inet_protocols to say ipv4 instead of all and restarted postfix. I see that I’m getting blocked for “unsolicited messages” now which I’m guessing means I’m temporarily blacklisted.