The last commenter (seeekr) has basically just said, don't do it yourself outsource it.
It doesn't actually answer the question of how you establish yourself as a good bulk mailer.
rmyates has covered most of the key points here and is a good answer however there are other factors to consider such as spam complaints.
All the large ISP's, hotmail, aol, yahoo, gmail monitor bulk senders by how many people click the "this is spam" or "report spam" buttons and each complaint counts against you. Combined with your frequency (consistancy) of volume and some other factors such as engagement e.g how many people open and click on your email makes up you reputation score. It is this score that defines how many emails you deliver.
Keep your volume fairly consistent over the days of the week/month. Keep your bounces low e.g for every 100 emails you send make sure at least 90% are delivered, send to opt-in only addresses e.g keep your spam complaints low and send relevant content which keeps your engagement high.
This will get you a long way towards your goal but remember, this takes a long time to establish, not days.