Non-existent bounces happen when the contact's Internet Service Provider (ISP) says that an email address doesn't exist. If you sent an email and saw "non-existent" emails in your bounce report, the best thing you can do is to check the email address for errors, and then try sending to the corrected email address.
Here's how to manage your non-existent bounces:
Or, if you're sure the email address is correct:
If your email is delivered, that's great! You're all set and don't have to do anything further. If your email continues to bounce as non-existent, you can try and get in touch with your contact to clarify the email address or remove the email address from your contacts to prevent any future sends to it.
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