What is the default value of Retry Attempts before a message hard bounces?

The default value for Retry Attempts before a message hard bounces is 30 retries. This means that when an email fails to deliver due to a temporary issue, the system will attempt to resend that email up to 30 times before considering it undeliverable and issuing a hard bounce notification. The rationale behind having a higher number of retries is to ensure that the email gets delivered in case of transient errors, such as a full inbox or a temporary server outage. This practice helps in enhancing email deliverability by allowing sufficient opportunities for successful transmission amidst possible interruptions.

Understanding the significance of Retry Attempts in email systems is crucial for managing email campaigns effectively. It optimally balances persistence in delivery with resource management, as excessively low retry counts might lead to unnecessary bounces, while excessively high counts could lead to resource strain on the sending server and potential spam flagging by recipient servers.