Is there a limit for sending emails per minute from my own server?

Question

PHP

It is necessary to organize mailing to users on a dedicated server.
Now messages are sent in cron once a minute for 200 letters.
The queue of letters has recently become clogged, tk. the number of users and mailing volume is growing.
1 IP address is used, DKIM and SPF are configured, users are real, we don't spam :)
Is there a limit for sending emails per minute so as not to get banned/spam?
Is it possible to safely raise the limit of 200 letters set by us and to what value?

Answer 1

To avoid the problems described in Alexander Litvinenko's answer, set up sending emails through special services like https://www.sparkpost.com/ , www.mailgun.com , postmarkapp.com , etc.
I will add here the services https://elasticemail.com/ and https://sendgrid.com/ - these services allow you to send not only transactional mailings, but also marketing ones.

Answer 2

There is no limit, it's your server, but as always there are a couple of nuances.
1. Mail services always react badly to new mailing servers.
2. Hosting may consider you spammers and refuse to provide services.