I hope Vault 6 is comming soon

Meanwhile, two ideas:
it would be great, as an option, to have the comment of a check-in sent as the object of the notification; it would avoid to open the mail (often doing that by phone) to look at the comment. More concise is much better (I don't mind the repository)
also, define the developer that made the check in, as the mail emitter. I often reply to check in with remarks, it only ease this process.
replace
emitter: notifs@xx
subject: [vaul-...] developer as changed $
by
emitter: developer@company.com
subject: CLEANUP: removed some warnings
I safely drops such check ins !
Best regards
Xavier