hi what's the difference between link:www.anonymailer.net and link: www.anonymailer.net (has space after colon) (I guess the first one true for looking up to back links)
link: www.anonymailer.net (with space) is consider as search query. and link:www.anonymailer.net (w/out space) is a google search operators that will list web pages that are "similar" to a specified web page. read more about google search operators http://www.google.com/help/operators.html
If I remember correctly both return the same result. But there shouldn't be any spaces between link: and the url and domain. I would also try to reduce that to link:anonymailer.net as it's a more general term, and you would also be listing pages with backlinks to http://anonymailer.net and not just http://www.anonymailer.net