Send speed setting


New Member
Good day. Tell me how to better configure the server to send messages faster.
Now we have two lists of subscribers 20k and 600k.
Sending occurs through different SMTP servers.

Server configuration where mailwizz stands:
Debian Linux 10
PHP Version: 7.3.4-2
Intel (R) Core (TM) i7-2600 CPU @ 3.40GHz, 8 cores

SMTP server:
2gb ram and 2gb cpu

Perhaps because of the weak nstroekt smtp letters take a long time, but in mailwizze itself sending is also not fast.

What is the sending speed limit? What is the best way to configure all this? Now 50k went in about 35 minutes.

Cron Configuration:

Just wanted to ask, there are several users. When one sends his companies, the second is waiting for the shipment, should it be?
Thanks for answers. In the end, I would like to understand what is more critical for sending speed. My weak SMTP or mailwizza settings.