So I've been doing a lot of redrafting of my first novel manuscript lately, and I think I'm coming up to the point where I'd like to start contacting agents and publishers. While I can find a lot of great info and resources on how to go about that, what to submit, etc. it's not too clear on the kinds of behaviours and conduct which are generally acceptable, and what's likely to give a bad impression or look amateurish. This is the kinds of things I'm thinking about; If you contact an agent with a manuscript looking for representation and they reject you, is it generally acceptable to resubmit a redrafted version in future? A completely new novel? Or is the rejection intended to be taken as a rejection of you as a writer, rather than just the manuscript you have submitted to them? If you submit your first three chapters as part of a submission, but decide to redraft (again!) in between that submission and any request for the full manuscript, is it acceptable to send the redrafted version, or will this just give the impression that you are submitting an incomplete book? Packaging. I understand that submissions generally should be sent loose, in plain white/manila A4 (not folded) envelopes, and that's fair enough (I've even decided against my usual wax seals, which is rather a shame) - but what about full manuscripts? ~500 pages naturally won't fit into a normal envelope, and even gusseted envelopes appear to have far too low capacity for this purpose. Is there a specific/preferred way to package full manuscripts, or is it simply a matter of "whatever you can get it to fit in"? Similarly, does this also apply to basic query letters to agents, or can I save myself some money on postage and envelopes by sending an A5 envelope with a second-class stamp? Any advice or resources here would be greatly appreciated.