Not all e-mail adresses receive mail

Hello all,

First of all I want to thank you for making this great plugin, I’ve used it a lot and it works great.
Only now I have a problem regarding e-mails coming through: The contact form is sending mails but I’m not receiving them.The strange thing is, when I use my hotmail account as receiver, It works fine. If I use [email protected], it doesn’t work.

I’ve tried a lot of things and looked through the documentation, but the weird thing is that the first e-mail adress receives everything and the other two don’t.

Could this be a plugin issue? Or is it certainly a server issue? Does anyone have experience with this?

Kind regards,
Nick Suykerbuyk