The problem is that I cannot send e-mails from my mail account jolanda.rekelhof@telenet.be and info@trazzhoreca.nl to hotmail and msn accounts. 

When trying to send an e-mail to such an account, different things happen depending on the email address I sent it from. 

When I'm sending the e-mail from info@trazzhoreca.nl, I receive an automatic e-mail stating that the mail couldn't be delivered to the recipients. 

However, when sending an e-mail from jolanda.rekelhof@telenet.be, I do not get a notification saying that the e-mails I sent got blocked but the recipient does. 

Could you please solve this problem as soon as possible, so I will be able to get in touch with my clients again.