Yes, this is possible.
It can be ensured that if you send an e-mail from PlanManager, the sender no longer receives firstname.lastname@example.org but for example email@example.com.
This takes some time to set up. The reason is that between your own mail server and the PlanManager mail server a number of settings have to be set correctly. To make this possible, your IT department should contact firstname.lastname@example.org. You can do this in PlanManager via the Help -> Contact tab.
If a private domain is used there will be 10 euro credits charged each month.