Sometimes the spam filters used by ISP can delete emails you actually want to receive.. so you get to see it!

(A) For Yahoo! users:
1. Open your Yahoo! e-mail account
2. Click “Mail” and select “Options”
3. Click “Filters”
4. Click “Add”
5. Click in the text box in the top row (”From header”) and enter xxxxx.com
6. In the pull-down menu for “Move the message to,” choose “Inbox”

(B) For other emial services:
Add xxx.com to your address book or list of contacts