Cold-mailing, mail-blast

I want to sent at the beginning around 500 emails/day with some offers.
Im not sure where i should start?
I checked sites like: atompark, group-mail, authsmtp, mailchimp but I think they are very strict with the anti-spam rules.
Will they ban me if i will send mails with offers?

I could invest in software or services.
I can buy domains if there would be needed, for example one domain for one campaign.

I totally don't know where to start, do i need proxy, or domains, or software etc?

I preffer to pay little bit more to don't do all staff on my own.
I have lists of emails, my own message and thats all.

Don't start at all.

Most of your shit will end in the spamfolder.

Most mail server don't allow spam

And it's pretty fucking annoying also.

Put in the work and create your own list!

So how to prevent mail go to spamfolder?
I could send emails more politely, with delays etc.
Just i prefer to learn how to do it corectly first not start with soft to mega spam emails and fuck up everything.

Still please for some advices.