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I undertand that if your bounces notifications are not properly set it can be really problematic.
I already make the configuration and everything looks great, but before i send my first campaing id like to know if there is a way to test if the system is properly working, and if all the conections between bounces.php, sns and sendy are ok.
Send a campaign (not the test send email function) to a list with only your email inside to test everything.