golang | error: remote error: tls: no application protocol

The short note.

I got the error "error: remote error: tls: no application protocol" in golang project during connection to a nginx webserver.

The core of issue - nginx was not configured for HTTP/2 protocol.

VMware vCenter Server 6.7 Update 3 can TLS in SMTP (STARTTLS)

Working with vCenter Server for a long time, recently in a first time I faced with the need to use secure SMTP session by TLS. And I was confused when I found that it not supported (in 2019!) - https://kb.vmware.com/s/article/2063147
I opened the ticket in VMware support and they said that it works in the latest updates, but the article still not updated.

I tested it on VMware vCenter Server 6.7 Update 3 (14367737) and it really works!