Finally get bounce mail from outlook.
Any idea what does it mean?
'450 4.7.323 tlsa-invalid: The domain failed DANE validation [Message=450 4.7.323 tlsa-invalid: The domain failed DANE validation]'
This error message seems to be returned by mailcow server to Microsoft server.
8/12/2024 1:20:36 AM - Server at BL1PR22MB3681.namprd22.prod.outlook.com returned '550 5.7.323 tlsa-invalid: The domain failed DANE validation(450 4.7.323 tlsa-invalid: The domain failed DANE validation)'
8/12/2024 1:10:35 AM - Server at xxx.com (my mail server ip) returned '450 4.7.323 tlsa-invalid: The domain failed DANE validation [Message=450 4.7.323 tlsa-invalid: The domain failed DANE validation] [LastAttemptedServerName=xxx.com] [LastAttemptedIP=my mail server ip:25] [SmtpSecurity=11;-1] [BN8NAM11FT043.eop-nam11.prod.protection.outlook.com 2024-08-12T01:10:35.996Z 08DCBA2CA7E2C673](450 4.7.323 tlsa-invalid: The domain failed DANE validation)'
Ok. Problem solved. Cloudflare for some reason added TLSA to my DNS. I don’t know how that DNS record got added. After deleting the DNS record. Email start flowing. So how do I properly seteup TLSA for Mailcow?