Hi Nick, thanks for reaching out!
To stop yourself from being emailed the invoices you are sending out to your customers can be done in settings. I will give you a step by step on how you can do this.
- Click on the settings cog wheel
- Select Account and Settings
- Select the Sales tab
- Select Messages
- Untick "Email me a copy"
- Save
I hope you find this helpful and if you need any further clarification let us know