EnglishHi Guys!
I hope you are doing well!
I have a problem with an email sending to gmail but to another Mailcow email I can sent. I have sent an email to Hetzner support, but maybe I should to something else too
More of that sending worked on 1st September to the same gmail mailbox
You have PTR only on IPv4, not on IPv6 so log into Hetzner admin and make sure you have IPv6 PTR also,…
Also I would add IPv6 DNS records, or disable IPv6 if you do not want to be bother, but there are some 
issues whit it docs.mailcow.email
Have something to say?
Join the community by quickly registering to participate in this discussion. We'd like to see you joining our great moo-community!
@AKarakutsa login to the Hetzner Cloud panel, select your server and open the Networking tab. Right to your IPv6 address click the three dots to edit your reverse DNS entry
Changed, but still the same problem. Should I try in some time?
Yes, give it some time, up to 24h depending on the DNS servers
