This site did not show evidence of storing passwords in plaintext.
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This site did show a clear way to unsubscribe from their emails
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Below is a sample of the emails you can expect to receive when signed up to cpacphoto.
I saw a message that you've tried to sign up for the January photovox. Here is the link to register if you're interested in attending: https://cpac.z2systems.com/np/clients/cpac/eventRegistration.jsp?event=4263&
Let me know if you have any questions.
Colorado Photographic Arts Center
1070 Bannock St, Denver, CO 80204
Office: 303-837-1341 http://www.cpacphoto.org/
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Voted "Best Place to See Photographs" 2017 Denver Westword