Hello zillah,
Thank you for reporting this issue.
We would like to take a closer look at this. For analysis we need some logs.
Please follow these steps:
First enable debug logging: GUI -> Settings -> General -> Maitenance -> Enable debug logging
Then reproduce the issue (turn on mailshield, then launch outlook and try to receive some email).
Then create support package and submit it (guide here:
https://www.avast.com/en-us/faq.php?article=AVKB33) and post here the ID of the created package so we can find it.
Thank you,
HK