====== 確認/テスト ======

===== SSL/TLS =====
  * [[https://www.ssllabs.com/ssltest/|SSL Server Test（SSL Labs）]]

===== 脆弱性 =====

  * OWASP ZAP

===== Mail/SMTP =====
  * [[http://check.jippg.org/|open relay checker]]
  * [[https://mxtoolbox.com/diagnostic.aspx|Email Server Test - Online SMTP diagnostics tool - MxToolbox]]