pingers.put(DomainPingType.EMAIL, new EmailPinger());
pingers.put(DomainPingType.SSL, new SSLPinger(truststore));
pingers.put(DomainPingType.HTTP, new HTTPFetch());
pingers.put(DomainPingType.EMAIL, new EmailPinger());
pingers.put(DomainPingType.SSL, new SSLPinger(truststore));
pingers.put(DomainPingType.HTTP, new HTTPFetch());