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The most common causes are:
– You don’t confirm opt-in to your mailing lists and don’t have any anti-bot mechanisms to prevent automation from adding recipients.
– Broken or missing bounce or engagement management.
– Email lists purchased from a 3rd party or use of any email appending services.
– Sending mail to very old customers or any address with whom you have had no interaction for > 2 years.
– Compromised accounts or services
– Infected computers or devices.
Watch our latest webinar “Blocklist ABC” where we cover the basics of blocklists
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Do you want to remove your IP/domain from one of our blocklists?
Please use our lookup-service and follow the instructions there in order to get that resolved.