Issues with Yandex mobile app or any other email client moving messages to spam folder?

[albatroz]

Hello,
I was wondering if any of you ever had problems with Yandex or any other email mobile apps
that may be moving emails from the inbox folder to the spam one.

I have the impression that one of my customers is have such a problem but don't how to detect it from the exim log files. Any suggestion?

 

[cPanelLauren]

You should be able to see the login and the folder change at /var/log/maillog