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Any suggestions on a SQL query that might allow me to pull a list of subscribers globally within a Sendy instance who have never opened an email? I know, the usual disclaimers apply – they may have opened, but not had images on, etc). I've got upwards of a hundred lists, and want to try to do it all in one fell swoop.
There's no single query to do that though. However in the latest version of Sendy, there's a 'Housekeeping' section where you can conveniently delete all subscribers who have never opened a single campaign you've ever sent to them: