All Email Templates published on Kissemails can be used for free. You can use them for commercial and noncommercial purposes. You do not need to ask permission from or provide credit to Kissemails, although it is appreciated when possible.
More precisely, Kissemails grants you an irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, distribute, perform, and use Email Templates from Kissemails for free, including for commercial purposes, without permission from or attributing Kissemails. This license does not include the right to compile Email Templates from Kissemails to replicate a similar or competing service.