You will read the words “The world’s largest online resource for family history documents and family trees” at the site Ancestry.com. One of the offerings of the site relates to some genealogy resources on the Internet.

You can access plenty of religions / churches mailing lists, with the essential details on geographic location as well as a quick indication of the purpose of those mailing lists. While at it, you might want to check out existing mailing lists in the UK and Ireland.