When trying to invite a new user, the following error is displayed at the bottom of the screen:

There are systems in place to counter the use of disposable e-mail addresses and domains that are often used for spam or other malicious purposes. However, on very rare occasions these complex systems may incorrectly flag an e-mail address or domain.

Please contact us, sharing the error you encountered and the e-mail address you tried to invite. We'll then check our system and, after verifying the information, clear the incorrect flag so you can proceed to invite the new user.