使用Cocoa Scripting Bridge发送电子邮件而无需事先知道收件人

    MailApplication *mail = [SBApplication
                             applicationWithBundleIdentifier:@\"com.apple.Mail\"];        

    /* create a new outgoing message object */
    MailOutgoingMessage *emailMessage =
    [[[mail classForScriptingClass:@\"outgoing message\"] alloc]
     initWithProperties:
     [NSDictionary dictionaryWithObjectsAndKeys:
      @\"this is my subject\", @\"subject\",
      @\"this is my content\", @\"content\",
      nil]];

    /* add the object to the mail app  */
    [[mail outgoingMessages] addObject: emailMessage];

    /* set the sender, show the message */
    //  emailMessage.sender = [self.fromField stringValue];
    emailMessage.visible = YES;

    /* create a new recipient and add it to the recipients list */
//        MailToRecipient *theRecipient =
//        [[[mail classForScriptingClass:@\"to recipient\"] alloc]
//         initWithProperties:
//         [NSDictionary dictionaryWithObjectsAndKeys:
//          @\"recipientEmailHere@example.com\", @\"address\",
//          nil]];
//        [emailMessage.toRecipients addObject: theRecipient];


    /* add an attachment, if one was specified */
    NSString *attachmentFilePath = \"<my provided file path>\";
    if ( [attachmentFilePath length] > 0 ) {

        /* create an attachment object */
        MailAttachment *theAttachment = [[[mail
                                           classForScriptingClass:@\"attachment\"] alloc]
                                         initWithProperties:
                                         [NSDictionary dictionaryWithObjectsAndKeys:
                                          attachmentFilePath, @\"fileName\",
                                          nil]];

        /* add it to the list of attachments */
        [[emailMessage.content attachments] addObject: theAttachment];
    }
    /* send the message */
    [emailMessage send];