IMAP adapter's process of mail retrieval

Hi everybody,

I am not sure if my topic fits in this sub-forum, but I didn’t quite know where else to put it. If it’s wrong, please move the thread. :slight_smile:

My question:

Due to some problems with an IMAP adapter that seemingly stops retrieving e-mails after a while, we are investigating this issue together with our client’s provider running the mail server (Lotus Notes :-/).

The mail server administrators asked us, when the IMAP adapter is marking a new e-mail as “read” when getting it from the postbox:
a) immediately after reading an individual mail and passing it on to the processing service? or
b) after processing all new e-mails that have been received since the last time the IMAP adapter connected to the server?

Thank you for every expert input :slight_smile: