Global twig variables are not injected

[einenlum]

My global twig variables are not injected in my mail templates (variable not found).

I think here it's missing the global context : https://github.com/PedroTroller/UniMail/blob/master/src/Knp/UniMail/Mailer/TwigMailer.php

[docteurklein]

you need to do:

$html = $template->renderBlock('html_body', $this->twig->mergeGlobals($mail->getParameters()));