Email notices and comcast.net patrons

A periodic check of the system logs for emails of library notices is suggesting that while the vast majority of notices are going through, most of the ones that are refused by the destination email service are comcast.net addresses. This is probably due to some gateway security setting by comcast that we don't have any influence over, but it's worth noting that if you do have a patron complaint that they are not receiving messages, check if they are a comcast patron and make sure that they add the endeavor.sirsi.net domain to their junk mail controls.