I, and similar to other friends I have introduced to Thunderbird, are long time users of this exccellent email app. As a resut, we have tried multiple times to donate to yourselves as we value the service you provide, but are unable to do so due to the additional, you might call them security checks, but we call them hassle when they fail to work due to either some bug OR missing database information. What we find is that your address check / verification is incorrect as it may be locked to an incorrect Eircode database (in the case of Ireland). As a result, it does not allow us Irish to donate to you or your service.