220 mx1.ddos-guard.net ESMTP ready to serve\r\n
220 mx3.ddos-guard.net ESMTP ready to serve 250-mx1.ddos-guard.net 250-PIPELINING 250-SIZE 40960000 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN
220 mx1.ddos-guard.net ESMTP ready to serve 250-mx1.ddos-guard.net 250-PIPELINING 250-SIZE 40960000 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN
220 mx2.ddos-guard.net ESMTP ready to serve 250-mx1.ddos-guard.net 250-PIPELINING 250-SIZE 40960000 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN