Hello everybody, I try to set up a SMTP Connection and get the following error: "error": "Hostname/IP doesn't match certificate's altnames: \"Host: subdomain.de.outbound.example.com. is not in the cert's altnames: DNS:example.com, DNS:www.example.com\"" There is a problem with the certificate of …

No, for custom SMTP providers the requirements listed at ( Configure External SMTP Email Providers ) include the support of TLS with a certificate signed by a public certificate authority and this cannot be disabled.

Disable TLS Security

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