It is just a note where to look into if you encounter problems with e-mail charsets. It is no criticism.
Everything was fine in the past if ubb.thread runs default on iso-8859-1. This litte point is hard to find if you code default in english and dont use country specific chars.
I knew that the phpmailer script comes from external sources.
Maybe it is a good Idea to set the page charset coding as an option in the admin panel and use vars inside all scripts. So you can change the charset easy at one place and dont need modify language and script files.
I knew the problems thats comes up with php 7.x and database connects very well. We have to keep an eye on it and how to handle the charsets while connecting the db and do some write/read to it.
