That is one thing I'm still learning.
I haven't sent out that many queries yet, but just got two single-paragraph form-letter rejections this past week. I understand exactly why agents send them, but wish I could somehow glean if they mean 'please don't bother anyone anything ever again and find something else to do with your life' or if they really mean that they're booked-up right now and that they really mean that some other agent might really LOVE my novel.
Gah!
Thing is, deep down, I know I'm not a bad writer. Sure there is always room to improve, but sometimes the persistence also involves querying more agents and publishers as well as honing one's craft more sharply.
And hey, they responded and it's a live email address. In six months I can always send them something different and they'll have no idea who it was anyway