The following error can be caused by a firewall blocking the iPAD/iPhone wifi connection:

...
      connect successful (1)
      clientHelloMajorMinorVersion: 3.1
      buildClientHello:
        majorVersion: 3
        minorVersion: 1
        numRandomBytes: 32
        sessionIdSize: 0
        numCipherSuites: 10
        numCompressionMethods: 1
      socketErrno: 32
      socketError: Broken pipe
      Error sending on socket
      send_size: 58
      Failed to send TLS message.
      Failed to send ClientHello
      Client handshake failed.
    Failed to connect to POP3 server.
    Failed to ensure transaction state.
...