telnet smtp.nifty.com 587 <return> 220 msag500.nifty.com ESMTP Nifty Mail Server ehlo localhost <return> 250-msag500.nifty.com Hello nttkyo801089.tkyo.nt.ftth.ppp.infoweb.ne.jp [121.94.5.89], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 20971520 250-DSN 250-AUTH=PLAIN LOGIN CRAM-MD5 250-AUTH PLAIN LOGIN CRAM-MD5 250-DELIVERBY 250 HELP quit 221 2.0.0 msag500.nift