Cannot login to email when routed through Cloudflare

What is the name of the domain?

zestlab.com.np

What is the issue you’re encountering

I cannot login to my email from Outlook/Thunderbird. I have my hosting and email from godaddy, and I can see all the emails on Godaddy’s native email client. However, when trying to access email from Outlook, it says server cannot be reached. Is there any DNS record that needs to be added, so that I can access my email through Outlook/Thunderbird?