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I keep getting people signing up to my mail list using firstname.lastname@example.org now I presume this is someone trying to get me blocked from sending is there a way to add the keyword "sentry" to the domain suppression list as there is also another one that keeps coming up sentry.wix.com I presume sentry is an industry standard for spam traps maybe?
The last thing could we have a suppression list that effects all brands so we can add known spam traps so clients using us do not damage our sending reputation?
Update to the latest version. The latest 4.x allows you to import suppression lists, or add domains to block.