delay_dsn_retry_interval

delay_dsn_retry_interval — base interval for sending DSNs to the sender of a message that has not yet been delivered

delay_dsn_retry_interval = "3600"

The base retry period in seconds for sending warning messages (delivery status notifications, or DSNs) to the sender of a message which has not yet been delivered. Momentum employs an exponential back-off scheme for sending DSNs. The first DSN is sent delay_dsn_retry_interval seconds after the message is queued for delivery. The second DSN is sent twice that after the second DSN. The third DSN four times that after the second DSN. The fourth DSN, eight times that. This process continues until delivery attempts for the message have ceased. The interval between DSNs cannot exceed delay_dsn_max_retry_interval.

To use this feature the delay_dsn module must be loaded.

The default value for this option is 3600.

delay_dsn_retry_interval is valid in the binding_group, binding, domain, and global scopes.

generate_delay_dsn, delay_dsn_max_retry_interval