220 mailexp.cnsis.org.cn ESMTP (3d05e4d8ab7ea219782269294e102b78)
250-mailexp.cnsis.org.cn Hello 224.142.19.19 [224.142.19.19], pleased to meet you
250-SIZE 100000000
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-PIPELINING
250-8BITMIME
250 HELP

net-snmp

SNMP:
  Versions:
    3
  Engine Boots: 3403
  Engineid Data: 80001f8880ea7434158329055600000000
  Enterprise: 8072
  Engine Time: 17:14:18