To setup an smtp server on Linux is super simple. There are a lot of manuals online. And there are a lot of providers where you can get a VPS in a couple of minutes for a day or more.
But there are a lot of problems with this setup. I have a VPS already for some years. Never used it to send spam. The IP is also not on a blacklist. But all emails I send to Microsoft email adresses (Outlook, Hotmail) arrive in the spam box. This is because the IP doesn’t have a reputation. So even before doing something bad the email already gets treated as spam.
Many servers use spam blacklists. If your IP is on one of these blacklists they will simply refuse to accept connections from your smtp server. It takes only a couple of complains and your IP will be there.
I now send all emails with Amazon SES. They ask about $1 for each 10.000 emails. I never understood there pricing structure, till now I never paid anything. But they will not allow you to send spam.
Yeah, AFAIK it’s illegal in whole world, although there are some ways around it, like saying you do cold mailing to look for a client etc, i’m not a spammer nor an advocate so don’t quote me on this
Laws are different in different countries. What can a country or law enforcement do against spam coming from China or so ? And you can also hide your identity. In my country you must do really crazy things before law enforcement does something. We have a website where you can report spam. But they will not do anything if they get 10 reports.
If you want real, reliable deliverability (not just throwing messages at inboxes), focus less on “how many accounts can I buy?” and more on how you send and whether you follow best practices.
Quick notes on your ideas:
Buy multiple Amazon AWS / EC2 / SES?
Pros: scalable and powerful (SES can be very deliverable if set up correctly).
Cons: you must handle IP warm-up, proper DNS (SPF, DKIM, DMARC), reputation monitoring, and bounce handling — otherwise you’ll still land in spam.
Multiple mail.ru / 25accounts etc.
Pros: cheap and distributed.
Cons: high risk. Free/domestic webmail accounts often have limits, unpredictable IP reputation, and can be shut/blocked quickly. Managing thousands of accounts is operationally painful.
Mailchimp or similar (ESP)
Pros: built for deliverability, lists, analytics, and compliance. Good choice if your list is clean and you follow their policies.
Cons: can be expensive, and strict TOS — not ideal for certain use cases.
EasySendy
Seems attractive for cost/speed, but check: list hygiene, bounce handling, analytics, and whether it gives you control over sending IPs and warm-up. “Cheap & fast” alone isn’t enough.
If your goal is white-hat bulk email with strong inbox placement, here’s what actually matters (regardless of tool):
List hygiene — remove invalid/old addresses, suppress complaints and hard bounces.
Proper authentication — SPF, DKIM, DMARC for every sending domain.
Reputation & warm-up — warm new IPs/domains slowly and monitor them.
Content quality & engagement — avoid spammy wording, and send to engaged users first.
Bounce & complaint handling — automatic processing and suppression lists.
Use reputable SMTP providers for volume delivery when needed (or reputable ESPs).
Practical option: If you want a tool that gives flexibility (webmail + SMTP), good list management, and features aimed at keeping deliverability high, check out AtomEmailPro. It’s built to import and send from many webmail accounts and SMTP servers while helping manage lists, bounces, and delivery behavior — which can save you a lot of manual work compared to stitching together hundreds of free accounts.
Final tip: whatever route you pick, start small, warm up, and measure. If you skip those steps, any cheap/fast solution will hit the spam folder eventually.