Still wating someone to answer.
I tried giving an “Alias” to Gmail to send the email through it but didn’t work to me. It just don’t send the email when the alias is activated.
the “option” I chose meanwhile the problem is fixed is create a new Gmail account and give the name of your company to it (yourcompany@gmail.com) but of course it’s not the same as the professional Email (info@mysite.com)