Seven days ago the certificate was expired of zuidpoort.netlify.app. This site has an external domain: www.zuidpoort.nl, and the certificate is failing for the external domain.
In the troubleshooting guide it is only about correct DNS settings… but this site is running for years now. After checking everything twice and reading through the docs I can’t find what is going wrong.
I’m showing that the SSL Certificate was renewed yesterday. Visiting the domain is properly resolving. Are you still seeing issues?
I am showing that you have an AAAA Record (IPv6) configured for zuidpoort.nl:
zuidpoort.nl has address 188.8.131.52
zuidpoort.nl has IPv6 address 2a05:d018:964:c0c:ac60:beb3:d5c4:7a41
zuidpoort.nl mail is handled by 80 mail.zuidpoort.nl.
zuidpoort.nl mail is handled by 30 aspmx2.googlemail.com.
zuidpoort.nl mail is handled by 30 aspmx3.googlemail.com.
zuidpoort.nl mail is handled by 30 aspmx4.googlemail.com.
zuidpoort.nl mail is handled by 30 aspmx5.googlemail.com.
zuidpoort.nl mail is handled by 20 alt1.aspmx.l.google.com.
zuidpoort.nl mail is handled by 20 alt2.aspmx.l.google.com.
zuidpoort.nl mail is handled by 10 aspmx.l.google.com.
We don’t support IPv6 when using our load balancer IP address and recommend that you remove the AAAA Record.
Thanks for the updated. I apologize as I didn’t notice that you had uploaded a custom SSL certificate. I do believe if the AAAA Record is removed for the apex domain, zuidpoort.nl, that it should resolve the issue with obtaining a Let’s Encrypt SSL certificate if you decide to purse that in the future.