Hope someone can help. Bit of a weird one. I currently have BCC emails set up to notify us of sales. I tried to put in two comma separated emails but weirdly the email always only sends to the first email in the list.
Sorry hear about your issue. Can you please try to provide some more details on the issue.
1.) Are you using any sort of email relay service?
2.) Also, when you added your email address, did you enter them as [email address1], [email address2]?
Please try to provide an screenshot of comma separated emails which you setup. Also do mentioned which version of magento are you using? so will do provide more detailed on the same.