220 smtp1.searchinform.ru ESMTP
250-smtp.unisender.com Hello 224.208.157.5 [224.208.157.5]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-SMTPUTF8
250 HELP

HTTP/1.1 403 Forbidden
Cache-Control: no-cache
Content-Type: text/html
Server: Caddy
Date: Fri, 17 Jan 2025 02:48:43 GMT
Transfer-Encoding: chunked

220 smtp1.searchinform.ru ESMTP
250-smtp.unisender.com Hello 224.238.215.60 [224.238.215.60]
250-SIZE 52428800
250-8BITMIME
250-PIPELINING
250-PIPECONNECT
250-SMTPUTF8
250 HELP