Add icon to message list

[emibcn]

Hi! First of all, thank you for this addon!!

I'd like to see the DKIM/DMARC (auth) results in the message list view with, for example, an icon (none, red, white-green, green), like what 'authres_status' plugin does for Roundcube: https://github.com/pimlie/authres_status .

[lieser]

A problem I see with this is that the verification is rather slow. Because of this, doing multiple verifications at the same time will probably result in a rather unresponsive UI. One solution could be to just display saved results.

Also note that I'm currently rather busy, so it's probably take some time until I will look into this enhancement suggestion in detail.

[jnmills]

+1 interested in this