Continuing with the Firefox/FC3 series, I'm receiving the following message when I try to send an e-mail (and the e-mail doesn't arrive to the destination). It works on a IE/Windows.

Code:
msg - Message not sent to any recipients because of these failed addresses: 
code - mail.SEND_FAILURE
method - ZmCsfeCommand.invoke
detail - soap:Sender
constructor - 
function ZmCsfeException(msg, code, method, detail) {
    if (arguments.length == 0) {
        return;
    }
    AjxException.call(this, msg, code, method, detail);
}

toString - 
function () {
    return "ZmCsfeException";
}

dump - 
function () {
    return "AjxException: msg=" + this.msg + " code=" + this.code + " method=" + this.method + " detail=" + this.detail;
}
This is the debugger's info:

Code:
Body: {
  Fault: {
    Code: {
      Value: "soap:Sender"
     },
    Detail: {
      Error: {
        Code: "mail.SEND_FAILURE"
       }
     },
    Reason: {
      Text: "Message not sent to any recipients because of these failed addresses: "
     }
   }
 },
Header: {
  context: {
    change: {
      token: 13
     },
    notify: {
      modified: {
        folder: [
          0: {
            id: 5,
            n: 0,
            s: 0
           }
         ],
        mbx: {
          s: 2061
         }
       }
     },
    sessionId: [
      0: {
        _content: "24",
        id: "24"
       }
     ]
   }
 }
Code:
code: "mail.SEND_FAILURE",
detail: "soap:Sender",
method: "ZmCsfeCommand.invoke",
msg: "Message not sent to any recipients because of these failed addresses: "