This must often happens if you bypass the host name check in discourse-setup and rebuild several times so that you get rate limited by discourse. Maybe you have cloudflare orange cloud?
Thanks for your reply. I am using Digital Ocean, I didn’t bypass hostname check and didn’t do rebuild. I did as mentioned in the GitHub instructions for docker based setup. I think I have to setup Let’s Encrypt manually.
To get in it. You can poke around and find the command that tries to get the certificate. I do it infrequently enough that I can never remember what it is. You can likely search here and find it.
My best guess is still a dns issue, but it sounds like you’ve done things right.
found the root cause , 1. Installation was not successful because in DNS IPv4 pointed correctly but IPv6 pointed wrongly (not updated). 2. Digital ocean not supporting smtp mail service on their droplets.
Installation now completed but still unable to receive admin verification email because of digital ocean restriction, checking with multiple options.
Sendgrid option failed don’t know whether its technology limitation or my mistake.
Sorry I was busy with other task. Anyone know how to use/configure mailgun or sendgrid or anyother smtp provider in discourse which is hosted in digital ocean. I did filling the details of sendgrid smtp credentials (username,password, smtp server, port, email, reply email, ssl email …) and ran rebuild but still no use.