Diagnosing hard bounce rates involves examining your ESP's dashboard for bounce statistics, but a deeper understanding requires obtaining rejection messages from ISPs. These messages, identifiable by three-digit codes, provide insights into why emails were rejected. They hold key information that can guide improvement strategies, which vary based on the cause of the bounce. If hard bounces persist, those messages will be essential for any expert assistance. Choosing a reliable ESP that provides access to this data can significantly aid the troubleshooting process.
When diagnosing hard bounces, analyze your ESP dashboard to identify the number of bounces and their trends over time, but don’t stop there.
Understanding the rejection messages from ISPs is critical for identifying the causes of hard bounces and determining appropriate mitigation strategies.
Rejection messages from ISPs are recognizable by their three-digit codes starting with a 4 or 5, alongside human-readable text explaining the rejection.
If you're encountering persistent hard bounces, it’s crucial to obtain detailed rejection messages to understand the underlying issues affecting your email delivery.
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