<domain yahoo.com> max-retries 10 retry-after 15m </domain>
This is where you tell PMTA how fast to send to specific ISPs. For 2025, ISPs like Gmail and Yahoo are stricter than ever regarding volume spikes. sample powermta configuration file
If you are writing a paper or thesis, you can reference this configuration and discuss: <domain yahoo
# Retry logic: How long to keep trying to deliver the email max-retries 5 retry-after 10m max-retries 10 retry-after 15m <