Remember when we used to submit queries and manuscripts via snail mail? Well, in some instances, we still do. But more and more frequently, publishers, editors, and agents ask for queries and manuscript submissions via email. So what is different about submitting this way as opposed to the put-it-in-the-envelope with a stamp and send it on its way?
If you're wondering on the correct way to submit electronically, I suggest you read Jan Fields’ “Postage-Free Submissions” piece on the Institute of Children’s Literature blog. From contact information, attachments, and formatting codes, this article will help you submit the right way. Also addressed are query and cover letters. Do we use the same format as we would for these in snail mail? This is an excellent article to bring you up to speed on the latest way to submit.
"Most editors do not like receiving more than one submission at a time from a writer--it's overwhelming. Limit yourself to submitting one idea, unless invited by the editor to do otherwise."-- Writing Tip from Writer's Digest Weekly Planner