Been a couple months since I updated Virtualmin. After updating, I noticed that user spam settings no longer worked.
After troubleshooting, I found that the newer updated lookup-domain.pl in /usr/libexec/webmin/virtual-server/ was different and over 2000 bytes versus the 1200 byte earlier file.
Using the older file and things work fine. The new file breaks mail and does not peform the domain lookup, value comes back null.
This a known issue? I have not really looked into it past this.