When you save, PlentyONE checks the connection to your mail server, including its SSL/TLS certificate. The message shows that this check fails: the certificate of your mail server has expired or does not match the host name you entered.

Error message

When you save under Setup » Client » Global » Email accounts, the following appears:

Unable to connect with STARTTLS: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Important

The certificate is only checked when you save. Accounts that have already been saved therefore often keep sending, but you can no longer save changes, such as a new password or a new account. The certificate of your domains under Setup » Settings » Hosting » SSL management is not affected by this error.

How to fix the error

1. Check the certificate of your mail server, for example with an online tool for checking mail server certificates. If it has expired, have it renewed by the operator or provider of your mail server. PlentyONE cannot change certificates of third-party mail servers.
2. Enter the host name that is stated in the mail server’s certificate. For standard providers, use their official SMTP address and not your own subdomain.
3. Select port 587 with TLS or port 465 with SSL. Even with the encryption None, the system attempts a STARTTLS connection. The error therefore also appears in that case.
4. Save the email account again.