This is very possible these days, and may result in more sales than writing a formal query for each publication you wish to write an article for. Still, if you want to impress an editor, online or otherwise, a formal, well-written query letter is a way to do it. Know your target Study any publication before you submit a query letter. Get writers guidelines for the publication if they are available Study the masthead to determine whom the editor is. Do not rely on Writer s Market.
Editors change jobs all the time.
You may send the same subject query to more than one publication, as long as they do not compete and you have taken the time to make sure the subject is appropriate for both publications. Your query letter should have a professional look. There should be no spelling or grammar errors. Be sure to include the date on your letter. This can be important if you feel later on that your idea has been stolen.