OpenSSL Error - Could not connect to remote server

[jcargilo]

Using Mailgun's "Send a Sample POST" feature from their inbound email routing feature to test a local site for a webhook I'm building. When I attempt to use the shared (free version) HTTPS url, I get the following error (granted, this is Mailgun's error):

Could not connect to remote server: [<twisted.python.failure.Failure OpenSSL.SSL.Error: [('SSL routines', 'ssl3_get_server_certificate', 'certificate verify failed')]>]

I was able to work around it using HTTP but I wanted to report this with some detail in case it's something you needed to be aware of. Once I switched to HTTP, the post came through on http://127.0.0.1:4040.

[foremtehan]

Could not connect to the server. Connection to sharedwithexpose.com:443 failed during DNS lookup. Last error for IPv4: DNS query for sharedwithexpose.com (A) failed: too many retries. Previous error for IPv6: DNS query for sharedwithexpose.com (AAAA) failed: too many retries

[zombieleet]

I am also getting an error similar to this, I used the docker image

ta_tunnel | Connection to eu-1.sharedwithexpose.com:443 failed during TLS handshake: Unable to complete TLS handshake: SSL operation failed with code 1. OpenSSL Error messages: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

i turned of my vpn and it started working properly

[rarestoma]

Hi,

I also got the same error and I fixed it by upgrading my php version to 8.0.

Hope it helps