What is the minimum amount of time Mimecast will accept a previously deferred message after an MTA retries delivery?

Mimecast's handling of deferred messages involves specific timing regulations to ensure effective email delivery and management. The minimum interval for accepting a previously deferred message after an MTA (Mail Transfer Agent) retries delivery is set to 60 seconds. This time frame allows the system to effectively manage retries without overloading the email servers and also provides time for potential issues on the recipient's server to be resolved.

Choosing this timeframe is crucial because it balances the need for timely delivery against the complications that can arise from repeated immediate delivery attempts, which may not only be futile but could also exacerbate issues such as server overloads or increased bounce rates. Therefore, a minimum deferment time of 60 seconds is established to optimize email flow and maintain operational efficiency for both senders and receivers.