Email are sending very slow

[djbtraffic]

Currently have two separate delivery servers confirmed and set up both running on large CPU/GB, however emails are still being delivered very slow.

About 545 recipients over about 20 minutes.

I am certain there is something that I am missing out on. Any advice would be appreciated.

 

[twisted1919]

Follow https://kb.mailwizz.com/articles/debug-send-campaigns-command/ and pay attention to where the most time is spent