How to organize mailing from different IPs?

Question

Email Marketing

Tell me which way to look.
The task when sending a site via SMTP, implemented on VDS, is to change every 10 letters the ip address on the domain.
ip - must match PTR, DKIM, SPF, etc.
domain 1.

I heard that some option or software is installed on the server part, which distributes the load on ip within 1 vds

and ip, preferably not from the main hosting, for example, I will buy them anywhere - in order to avoid account blocking if "abuses" will go.
? - the proxy saves from it? I haven’t studied it yet - I don’t understand the essence of a proxy in such logic, but as a Option they offer.

- well, for the price of course it should be available for a mortal not for 200 rubles per ip,
whoever can pass this question, where to look?

Answer 1

PTR without control over DNS does not make IP addresses, so what proxies can be?
the cheapest is a server-mailer
if the topic is gray-black - send spammers from where, but then what does PTR have to do with it?