There's a closed pull request on the void-packages repository

davmail: update to 6.1.0.
https://github.com/void-linux/void-packages/pull/44161

Description:
Template improvements:
- Add an example `davmail.properties`
- Remove superfluous `post_install`
- Add dependency on `java-runtime` virtual, because a Java application needs a JRE

#### Testing the changes
- I tested the changes in this PR: pending

I don't yet have a viable workflow for davmail but will see if I can get it going.

cc: @Anachron