ZOHO IP blocked by Trend Micro

Is seems that one of ZOHO's servers is on a bad rep list from Trend Micro:

Client Host [31.186.226.226] blocked using Trend Micro Email Reputation Service. Please see http://www.mail-abuse.com/cgi-bin/lookup?ip_address=31.186.226.226

Is there any idea on when / if it will be removed from the list?