Understand how the rate limit works in Trend Micro Email Security and Hosted Email Security.
Below are the rate limit values:
|By IP address||500 messages per minute per sender IP address||1,000 messages per 5 minutes per sender IP address|
|By email address||200 messages per minute per recipient email address||500 messages per 10 minutes per sender email address|
If any of these rate limits is reached, message delivery will be delayed until the rate goes below the limit at a later time. For more details on this scenario, see "Rate limit temporarily exceeded" shows as Block Reason for blocked or delayed emails.