Yes, Shiptheory does integrate with DHL Parcel UK which was previously known as UK Mail. UK Mail was purchased by DHL in early 2019 and renamed it to DHL Parcel UK.
Within Shiptheory, we still refer to it as UK Mail but it can be interchanged with DHL Parcel UK.
If you need help setting up your UK Mail account with us, you can follow this support document below:
Having trouble getting everything set up? Feel free to contact our Support Team, and we'll be happy to help.