We have been asked to generate sitemaps to assist robots indexing our site because we generate content dynamically. So far, we can create those maps just fine and they seem to pass XML validators just fine. However, we're concerned that we may have missed something that Google requires or is otherwise incompatible with Yahoo! and Bing. (For example, a missing element attribute.)
If we make our sitemaps live and the search engines find an issue, how would we learn about it?
Do Google, Bing and Yahoo! all email our email@example.com address? Are there specific pages in their respective portals we should watch for errors? How can I assure my management that our site suddenly hasn't "gone dark?"