Issue Plesk/Mail server content doesn't match with webmail

[dvl]

Plesk/Mail server content doesn't match with webmail. For our of our domains (user) number of emails on server and number of emails that can be seen via webmail doesn't match.
Webmail show too many emails more than on server and all webmail content can be opened. Did someone had similar situation or some explenation? Thanks!

 

[Bitpalast]

Is it thinkable that some of the mails are sorted into subfolders so that you can see only a part of your mails when you look into one folder on your disk?

 

[dvl]

Is it thinkable that some of the mails are sorted into subfolders so that you can see only a part of your mails when you look into one folder on your disk?

No, that's not the case here. For example, on server we have emails from the end of 2021 and later, meanwhile when I log to webmail of this specific user I see emails from 2020. I can open them and when I do that, while using GetWebsiteIP extension for Firefox I see public address of our server. How is this possible, I can not understand. There is no some subfolder when thees emails are hidden. In any case thank you Peter for your time to respond me. Best regards!