Version	Enhancements
v3.0x	Verification of mailGraph in Zabbix 7.0 LTS and Zabbix 7.2. (released in v2.20)
v3.xx	Installation assistance wizard (CLI based).
v3.xx	(Semi)Automatic updates of mailGraph, considering Composer approach.
v3.xx	Refactoring of code to allow for code re-usage from a functional perspective.
v3.xx	Removing the "Graph get" function into a standalone PHP script. This will a) disassociate the function from the main code and b) prepare for automatic setup and installation assistance.

Pending with Zabbix

Since 2019

Upcoming enhancements in Zabbix where the graph image can actually be retrieved via the Zabbix API instead of this "(non-supported) workaround" (as per Zabbix developers in https://support.zabbix.com/browse/ZBXNEXT-562 and https://support.zabbix.com/browse/ZBXNEXT-5611). Additional benefit is that fetching images for other webhooks will become relatively 'easy' to consume. Meanwhile considering splitting the "Graph get" function into standalone unit within mailGraph for the purpose of easy re-usage.

Ideas

Always welcome! Brainfarts from my end:

Enhancement
Ability to switch templates via custom Tags in a Trigger.
Ability to attach a dashboard output to the message.