My company is using zimbra email server and McAfee ePO 5.3. With Email Server config on McAfee ePO, If I use SMTP server port = 25, McAfee ePO can send test email well. But If I use SMTP server port = 465/587, McAfee ePO can't send test mail. I want config SMTP server port = 465/587 because that is company policy. I don't know, Can McAfee ePO support zimbra email server with port 587?