Hello Martin,

Thank you for posting your query. We will enquire with our team to et more details and a solution. 

(we have removed some info from your post to protect you and your colleagues)

Hi Martin,

Our developers have confirmed that your mail server is blocking the messages, based in the invite e-mail content.

We have forwarded an e-mail to you, and request that you ask your administrator to review the content of the mail, and advise us what possible could be seen as "spoofing" on the mail.

The mail contains general text and a hyperlink to access the cloud payroll.

We appreciate your feedback on this, to ensure your colleague can receive the invite.