I am using the following rss address I got as a result of using rss online software. http://feeds.rapidfeeds.com/434/ Most rss feeds seem to end with xml so I want to know if I submit the address above with no xml on the end will it be excepted by rss directories because it does not have xml on the end.
That won't be a problem at all. If a directory needs "xml" on the end then it is most definitely broken. Many feed address end in things like .rss or .atom