A previous transactional email provider (Mailjet) automatically added hard-bounced email addresses to the suppression list. I would suggest that this would be a good feature for ZeptoMail to adopt.

As an ecommerce company (a fairly typical use case), we end up sending several emails in relatively quick succession (order confirmation, shipping notifications, delivery notifications, etc.). If the first email bounces, continuing to send the later emails to that address only serves to deteriorate one's sender reputation.

I believe Mailjet forced users into this auto-suppress scheme. It would be nice if ZeptoMail offered it as an option (probably worth enabling by default).