Hi, GA39
Thanks for your post.
We're glad to have you here in the MYOB Community Forum. Regarding your concern, kindly try sending the pay slips again one by one to see if they will be sent to the wrong employee. Also, you may check the settings of your Outlook from your AccountRight. To do this, kindly go to Setup > Select Preferences > Click Emailing tab. You may also check The Help Article: Sending emails using Microsoft Outlook for further information.
Please let us know if you require any further assistance with this. We are happy to assist.
Best regards,
Doreen