Notification for specific contacts

[Mannshoch]

On Smartphone I have the Problem, that I miss important Mails.

I need a way to set Important contacts which force a Notification on Smartphone. There are even contacts which should force a permanent notification which only disappear if the mail was read. 

[Mannshoch]

Work together with Fossify Contacts tp add there a seeting for notification. (Fossify Issue )

In best case Thunderbird and Fossify develop an api where An app could register themself in Fossify Contacts and allow to steer Contact based Notification.

The cause I want it in Fossify Contacts is that Fossify couöd save this setting in CardDAV and that way sync to an other Phone and to Dektop where Thunderbird Desctop as Contact manager could also react to this.

As a side Note. If you go this Way - which aI really would love - Fossify need a way to deactivete this on Addressbook basis. Cause I share some addressbook with my family.