There are several mailing lists which might be interesting to users of xen-tools:

xen-tools-discuss

This is a general purpose mailing list, for reporting bugs, asking questsion or making suggestions.

xen-tools-dev

This is the developers' mailing list for communication between the developers of xen-tools.

xen-tools project at gitlab.com

The xen-tools project at gitlab.com allows you to "watch" the project or single repositories of it for changes which you can also receive by e-mail.

xen-tools project at github.com

The xen-tools project at github.com allows you to "watch" the project or single repositories of it for changes which you can also receive by e-mail.