Adding someone can fail for a number of reasons.
- Check whether the e-mail address is correct;
- Check whether the e-mail has landed in the recipient’s spam folder;
- Check whether the recipient’s mailbox is full.
Is this not the cause of the problem? Please contact our support team on weekdays between 08:00 and 18:00 on +31 (0)570 724 021 or send an e-mail to email@example.com