After attempting to release an item from quarnatine by email, the item is quarantined again after being released from quarantine by Mail Security for Microsoft Exchange (SMSMSE).
The item has a different quarantine ID after being re-quarantined, and there is a notification generated and event log entry generated indicating that the item violated a policy.
It takes more than 1 minute for the item to re-appear in quarantine.
When releasing an item from quarantine by email, SMSMSE creates a unique ID for the message called a reinsertion string, and inserts that string into the subject of the message. This reinsertion string is only honored for up to 1 minute. If it takes more than 1 minute for the message to be received and processed by Exchange, the item will be re-scanned, and any policies configured in SMSMSE will take effect on the message.
SMSMSE can be configured to honor the reinsertion string for up to 5 minutes to allow a longer time between when the item is released and when it is delivered by Exchange while still not rescanning the item.
To change the timeout for the reinsertion string:
SMSMSE will now honor the reinsertion string for up to 5 minutes, instead of the default value of 1. This should provide ample time for Exchange to process the released message and prevent it from being re-quarantined.