Just wondering, why the Email media type cannot work with the message ID like the Slack media does. I mean, for the Slack media, Zabbix keeps the message ID and then updates the message. But for the Email media type, Zabbix does not keep any ID, sending a new message every time, but using the `In-Reply-To` field filled with something like `In-Reply-To: <{EVENT.ID}.{something_else_long_but_unique_to_the_installation?}@zabbix.com>`. I think it might work with some email systems, but unfortunately, it does not work with Outlook, so the messages are scattered around, causing a mess. Probably it's because those messages are replies to a nonexistent message, and even the problem notification is marked as the reply. Let's think about changing that approach.