[MlMt] Grouping messages by pattern ?

[Max Rydahl Andersen]

Hi,

I raised this question back in [2014] and I'm wondering if there have 
been any new features added that could help :)

Usecase is that I receive a lot of invites, updates and cancellations in 
my calendar.

Thus I've created mailbox named "Calendar" with the condition 
`X-Calendar-Attachment exists` which give me some something like this.

```
Invitation: Strategies about World domination @ May 1 2042
Invitation: Pointy haired boss visit @ June 1st 2017
Updated Invitation: Pointy haired boss visit @ June 1st 2017
Cancelled Event: Strategize about World domination @ May 1 2042
Updated Invitation: Pointy haired boss visit @ June 1st 2017
```

Now I would like to group all of these under the same invite title so I 
get sub mailboxes like this:


```
Strategize about World domination (2)
Pointy haired boss visit @ June 1st 2017 (3)
```

By using mailbox name format `${subject.body/.*?:(.*?)@.*/$1/}` I can 
get to this:

```
Strategies about World domination @ May 1 2042 (1)
Pointy haired boss visit @ June 1st 2017 (1)
Pointy haired boss visit @ June 1st 2017 (1)
Strategize about World domination @ May 1 2042 (1)
Pointy haired boss visit @ June 1st 2017 (1)
```

I'm wondering if a "group by unique name" or something similar could be 
possible under sub mailboxes ?


[2014]: (https://lists.freron.com/mailmate/2014-January/001794.html)

Thank you,
/max
http://about.me/maxandersen
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