Migration from 7.1.3 to 8.0.1 - using zextra/zxmig tool , was easy migration -

Everything seems to be working except couple of things .

1. Get a ton of
NOQUEUE: filter: RCPT from unknown .... sender address triggers FILTER - been reading some of the docs and it say it is normal?

When I try to add members to a distribution list - it allows. However on Save - it says. I did run zmfixperm too incase that was to do with permissions. Any pointers would be helpful.
Invalid request
Message: invalid request: zimbraIsACLGroup is immutable Error code: service.INVALID_REQUEST Method: [unknown] Details:soap:Sender