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Soft Bounce Causes Explained — Identify temporary issues and know exactly how to respond. Learn More →

What are common soft bounce reasons?

Common soft bounces include mailbox full, temporary server errors, greylisting, transient network failures, and rate limiting. All soft bounces return four xx SMTP response codes such as 452 or 422 which indicate a transient error or temporary failure. These conditions may resolve on their own.

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