Support Reminder For Email Attachments

[4jNsY6fCVqZv]

Prerequisites

• [x] I have searched open and closed issues for duplicates.

Feature

Is your feature request related to a problem? Please describe. Unfortunately it happens far too often and it would be nice if Mail would support me in sending a mail only once.

Describe the solution you'd like Mail should ask on the basis of keywords whether I would like to add the appropriate attachment if I should forget it. It would be wonderful if I could edit the corresponding keywords myself, if necessary.

Existing work I am aware that Evolution mail offers a plugin for this.

[jlnr]

This came up in #232, but having a separate issue is definitely better :+1: Just linking for reference.