Sending to php. How to make multichannel?

Question

PHP

I rent a server. There is a newsletter script on the server. In order not to get banned and not to flood the queue, letters are sent 30 letters once a minute. The script works on IP xxx.xxx.xxx.xxx
Question: if you buy an additional IP and attach it to a new subdomain, then write a mailing list, will the queue of letters be new or all letters go to one queue and this will mean that 60 letters are just a minute will fall in line.
I would like to increase the speed of sending by multi-channel sending.
Thank you.

Answer 1

You need queues, look towards rabbitmq.

Answer 2

I have a queue itself, organized through CRON.

Answer 3

The problem will be that when sending letters, the host will take the value of one IP - the main one. If you implement using a different IP via cron, then everything should work.