How to disable to delete email from POP?

[Capital Careers]

Hello

I am facing an issue that whenever any customer raises a request to my service desk email, my email gets deleted from inbox. I have POP email type.

Can someone help me disable that?
I tried finding it out but couldn't get a resolution.

Thanks

[Nic Brough -Adaptavist-]

There is no issue here.  It deletes the email to prevent it being reprocessed and creating a new issue every time it checks the incoming mail.