Strange results when sending mail

Hi

We are testing Notes 9 and have seen some strange results when sending emails. This doesn’t happen all the time, just a few times a day. There appears to be no specific reason to it. Just wondering if anyone has any ideas…

When a user sends email, they have experienced occasions where the recipient gets a ‘new mail’ notification but when they check their inbox nothing has arrived. The sender has something in their Sent Items but it is a blank mail that is addressed to themself???

We are using Notes Client 9 but still using the Notes 8.5 backend/templates

Thanks

Subject: example of error, plese

Can you upload a screenshoot?

Have you check mime configuration?

What saves at sent email?

Regards

Jose