That's not my experience. Before I setup my DO I asked them can I set up ESP? They said absolutely. AFAIK they only ban constant abusers. I sent to very clean

That's not my experience. Before I setup my DO I asked them can I set up ESP? They said absolutely. AFAIK they only ban constant abusers. I sent to very clean and engaged list (noone above 45 days of inactivity) and hadn't had any problems. I have "emergency setup" on different hosting but you are right on point it would take month to come back to same mailing levels. DO TOS doesn't say you can't send emails. Their control panel allows you to setup rDNS yourself BTW. These days largest ESPs (Google, Yahoo/Rocketmail, AOL/Live/Outlook/Hotmail, GMX, Wanddo, Orange, UOl, BOL) only really look at IP in 4 categories: narrow whitelist (other biggest mailers, private contracts [banks mostly]), wide whitelist (static IPs of all sort including your $5 DO), greylist (home IPs, mobile IPs, all other IPs that probably should be mailout out in the first place), blacklist (in terms of you land there forever - don't confuse with having your IP blacklisted). Long gone times when ESPs tried to figure on some scale 1-100 how good your IP is.