e-mails don't get fetched in inbox

Hello,

I installed Espo about 2 weeks ago and everything seemed to work fine.

However as of today it seems that incoming emails don't get fetched anymore or aren't shown in the inbox.

So far I
- reinstalled all settings and mail addresses but nothing appears in my inbox
- all test mails and test connections seem to work
- reconfigured all smtp and imap settings (nothing changed)
- tried ssl and tls, no change
- tried pop3 instead of imap, no change

When I look at the web mail client of the email impacted everything seems to work fine on that side.

Is there anything else I can check or do to force the mails from appearing again?