I have a number of sub-servers that were imported from an old server that are still configured with an old contact email address. While the parent server is configured with the new/current email address of the owner/user at Virtualmin -> DOMAIN -> Edit Virtual Server -> Configurable settings -> Contact email, changing this does not seem to change it for the sub-servers. At the same path on the sub-server there is no field to change this email address, so the old email address is still in the system, appears on the Virtualmin -> List Virtual Servers page, and Virtualmin tries to send emails to it.
I'm guessing I'll need to change a configuration file on the command line to fix this, so this is both a bug report to have this fixed in future versions, and a support request for where to find this config file, or a way to change this within Virtualmin if there is an existing way. Thanks.