220 ESMTP
250-localhost
250-PIPELINING
250-SIZE 5242880
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

nginx

HTTP/1.1 403 Forbidden
cache-control: no-cache
content-type: text/html
server: nginx
connection: close

SSL Error: TLSV1_UNRECOGNIZED_NAME