Hi BS1231,
Thanks for your post, and welcome to the MYOB Community Forum.
Depending on the security settings at your customers' end, the emails received may be put in the Spam or Junk folder. It will also help to have your customers add noreply@apps.myob.com to their whitelist to make sure the emails are not blocked. You may also check the Help Article: Print or email sales for more information.
Feel free to post again anytime if you require further assistance.
If my response has answered your inquiry, please click "Accept as Solution" to assist other users in finding this information.
Best regards,
Doreen