Un ottimo script (App Script Google) che permetti di aver un comodo elenco su foglio elettronico degli indirizzo bounced.

https://www.labnol.org/internet/gmail-bounced-email-report/29209/

[sourcecode language=”plain”]
/*

* Gmail Bounced Emails
* @labnol December 14, 2016
* Written by Amit Agarwal

* email: amit@labnol.org
* twitter: @labnol
* web: https://ctrlq.org

*/
[/sourcecode]