Yes, delivery to a packing station is possible without any problems. To do this, you must first register with DHL. If you haven't done so yet, you can Login here.
For delivery to a packing station, you only need to consider these points when entering your delivery address:
Enter the following in the “Street, house number” field: Packstation + No. (z.B. Packstation 100)
Enter yours in the “Additional address or company” field Zip code a.
By the way: We send our cards in a flat A5 envelope that fits into any normal mailbox. So you don't have to be at home for delivery.