email module: Update of Emails stops

[CarstenD]

I am using the email module together with an gmx.net account (not gmail). So far everything works okay but after some hours (sometimes a day) it stops showing new E-Mails.

I think that might be caused by the fact that the provider (gmx in this) drops the IMAP session and thus no new email push is received. Also tried with other providers and it shows similar behaviour.

Is there a way to invoke a manual update in intervals? Or sending a notification to re-connect / re-establish the session?

I tried using the schedule module to send a LISTEN_EMAIL notification but nothing happens.