Incoming Outgoing Mail Server Need help, a few questions?

Question

Mail server

Hello. Tell me please. I am looking for an outgoing mail server for the site (for registration / account recovery on my site).
The problem is that users of my niche often register 5-10 accounts, and it often happens when they enter incorrect email addresses by mistake, despite the captcha. And actually the first server of outgoing mail, limited such actions, and if the limit worked, then chopped off the mail for a day.
Actually, closer to the question, does it make sense to use such services? Can I set up a mail server on my own VPS? If possible, how? Are there any disadvantages of the actual mail server on a VPS? How to deal with the situation when a lot of letters are sent to a "non-existent address"? What might follow? What are the pros / cons of services that provide outgoing mail server services?
I also found a dedicated mail service from my domain registrar, they give 200 letters per hour, it seems not a little, but I would like unlimited and some kind of stubs in case of incorrect mail

Answer 1

Can I set up a mail server on my own VPS?

On a full-fledged VPS, you can do anything you want

If possible, how?

Install the required software. Make the necessary settings. To enjoy life :)

Are there any disadvantages of the actual mail server on a VPS?

Yes :) You do everything yourself. You put it yourself. You set up yourself. All sorts of anti-spam, anti-virus, anti-hell-knows-what - all by himself ...

How to deal with the situation when a lot of letters are sent to a "non-existent address"?

From the server? No way. They just hang in the queue, hang (according to the standard for 5 days) - and leave.

What might follow?

Nothing.

What are the pros / cons of services that provide outgoing mail server services?

Pros - everything is done for you
Cons - you have to eat what will be served :)

Answer 2

Answered all questions here
https://7fk.ru/nastroyka-smtp/
There are many advantages of paid SMTP. Almost everyone has fairly large free packages. Tip - try it and see the difference