How to manage wrong email addresses of customers?

Hello,

We have a global Operations team based out of multiple countries and at times during an email conversation the teams add incorrect email addresses in the CC (Which creates contact on Zendesk).

The problem is that other teams without cross checking then use the same email. 

This has caused a lot of miscommunications between the teams and the customers because the customers say that they never received our email (Because it was wrongly added initially).

How can we solve for this? Any suggestion?