And, of course, I received an email from Mailer Daemon, saying the email was not sent... I hope though it was sent to the other address. I also added eXch in Bcc. Let's hope for the best...
(...)
It's an invalid email address. - More details on this email
Well, I also ended up receiving it, several hours after I sent it.
It was a failed attempt. Sorry for the extra work I gave you guys!
We will keep trying.