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How do I process bounced emails when sending to a mailing list?

I send out newsletters to my mailing list via 3rd party mailing site, e.g. MailChimp, Elastic Email, etc. They are opt-in and verified. Over time, they become invalid. So some emails get bounced. I receive the bounced email at my sender or reply-to email address.

Should I just ignore them and have the mailing sites somehow mark them as inactive?

Or should I create automation to process the bounced emails and unsubscribe them by "clicking" the unsubscribe link or call an API to unsubscribe them? If I should process those emails myself, what nocode tool would you recommend?

on December 18, 2022
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    I googled that for you (you can thank me later) and it seems mailchimp manages bounces for you by cleaning them from your list: https://mailchimp.com/en-gb/help/about-bounces/ under the heading "Does Mailchimp manage bounces? ".

    I bet every service like mailchimp does that because they don't want to be penalized by Google etc for sending to invalid addresses or similar issues.

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      Thanks. So I guess in addition to processing the bounced and auto-reply emails, those services also forward those emails to me. That is why I thought I also need to process them myself. ;-)

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        Ohh, I see - yeah you are welcome :D