[Plugin: ThreeWP Email Reflector] All messages get ignored?

I just installed this plugin, I think it will suit my mailing list needs perfectly, so I’m eager to get it working!

I installed the plugin, created a new list, left all settings as they were (except IMAP host name, username en password of course) and added a few readers.

Then I tested the list by sending a test email. But when collecting, I always get the message:

– connecting to imap.mydomain.com with username [email protected]
– 1 messages found
– Is testmessage a code?
– Ignoring message from [email protected]

I seems like collecting from IMAP goes fine, but all messages (also tried with other senders and/or recipients) seem to get ignored.

Is there some setting I missed or something else I’m doing wrong?

https://www.ads-software.com/extend/plugins/threewp-email-reflector/