Calculating complain and spam rates

Emails sent via EmailOctopus rely upon Amazon as the ESP (email service provider) to monitor and control the variables of spam. 

Regarding complaint rates, there is not a "definite" figure which will result in a ban from EmailOctopus and Amazon SES. Generally speaking though, try to keep these around 0.1% or below for your campaigns. 

Use the below equation to calculate if your complaint rate is below 0.1%

If you'd like to familiarise yourself more about how AWS handles complaints read here:
https://aws.amazon.com/blogs/ses/tag/complaint-rate/