After languishing for so long on my To-Do list, the Course Contacts block has finally had a brush-up and polish for Moodle 3.8 (and 3.9 when released - it has been rewritten on a 3.9DEV/Alpha instance).
The old code that referred to an email plugin and hasn't actually been used for several versions is gone
The name truncation is now removed (as several style changes have rendered this less than useful anyway)
Setting options to enable/disable guest access implemented, along with several other issues which some very patient people have submitted to Git in the last year or so. Thank you for all those issues and pull requests which are now integrated (Pull requests have not been implemented as such, but the code in each of them was added manually while I was doing the rewrite, so again, thank you for all those contributors).
Thank you to everyone for your patience! I will try to keep more on top of this useful (I hope) plugin going forward.