Why did I receive a message saying my email to a company bounced?
From time to time your message may bounce to one or more of the addresses included in the list. This happens usually for one of two reasons: Either the recipient receives so much mail their box fills up, or the recipient blocks our servers. It is important to note that we always include several relevant addresses in each mailing so that, in the event some email boxes block the message, it still gets through to other recipients. We are continuing to find ways to work around this problem so messages continue to get through.
Options would be to go to the company’s website and locate their "contact us" page or if you are contacting a government official, you can contact your Congressman at www.senate.gov or www.house.gov.