Links:
www.cloudways.com/blog/send-emails-in-php-using-phpmailer/
www.wikihow.com/Install-PHPMailer
github.com/PHPMailer/PHPMailer
github.com/PHPMailer/PHPMailer/blob/master/README.md
help.dreamhost.com/hc/en-us/articles/360031174411-PHPMailer-Installing-on-a-shared-server
Encoding (lang):
stackoverflow.com/questions/374425/convert-utf8-characters-to-iso-88591-and-back-in-php
www.php.net/manual/en/function.mb-convert-encoding.php