bounce-after 2d # Retry transient errors for 2 days before bouncing retry-interval 15m # Retry deferred emails every 15 minutes Use code with caution. 2. IP and VirtualMTA Architecture
<virtual-mta client-b> smtp-source-host 203.0.113.20 mail.client-b.com
Example:
<domain *> # Default settings for the "Long Tail" (smaller ISPs) max-delivery-rate 1000/h retry-interval 5m bounce-after 5d </domain>
Example: