An interesting development: my posting to this list a few minutes ago seems to have triggered an autoresponder asking me to confirm the issuance of a support ticket by Liquid Web, whoever they are. - Brian

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On Fri, May 24, 2019 at 08:17:31AM -0700, Brian Kantor wrote:

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Anne, the way that such addresses are often harvested is that one of the spammers (or his agent) becomes a member of the list and simply records the addresses of persons posting to the list. They then get spammed.