Could you please tell your readers (of which I am one):
1. No more querying mutiple agents via email! For those of us who accept email queries, we certainly can read the CC line to see that you also queried the rest of our office. And even if the author is quick enough to use the BBC function, agents just kinda know if something's been shopped around. One agent, one manuscript per agency at a time. You can do a mutiple submission--just one agent, one ms per agency at a time.
2. Not to submit more than one query at a time to an agent. No more letters with "I hope you'll like at least one of the twelve novels I've written " in queries. Frankly, and I think you will agree, that when I read that the author has 12 unpublished novels on the shelf, then there's got to be a reason why none of them have been published.
Agent Cool makes a very good point and I'm glad she wrote in since Miss Snark does not accept email queries and it hadn't yet occured to her that anyone would be nitwittish enough to send email queries to "dear agent".
Email queries vary only in their delivery system from snail mail queries. Yes, you have to put the agent's name on them. Yes "dear agent" or "dear submissions review board" or "dear Mr. Snark" are all BAD BAD things.