Uncheck the box and save your settings. You may experience one more download of repeated email, but at this point it will be removed from our server and future repeats will not occur. Please note that if others send you the same email over and over again, this will not stop that. You will have to notify the sender to cease sending the repeated email. However, due to the underlying problems of the existing phone infrastructure, these modems can sometimes have problems trying to connect.
Some modems are a bit overly-aggressive in trying to connect, that they end up failing altogether.
The actual number that works right for your computer will vary from two to five commas, so try different amounts for best results. Then, connect as normal. Try several times to get a good average of which number of commas works best, too few or too many may result in no connection at all. You will want to go into the properties of your connection and add them to the end the number there. That way the commas will always be dialed in the future.