Hi, Juan, thank you for developing this plugin and for mantaining it.
I have found a problem with certain users that can not see the button new mail in front page and within the courses. I have enter as these users and I can not see it, but if I enter with the role of that particular user I can find it there. The user is been given the role in a category level, just in the case it helps, although I have tried giving that role in the course locally too, with the same success.
The role has all the Jmail permissions ok.
We have just upgrade to moodle 3.1.5
I attached a .zip with screen captures of both cases.
Is there anything that I am missing?
Thanks again, Juan