How does 'From' ID behave in case of Report Subscriptions, Alerts, Sechedule Email and Export email?
Modifying the 'From' email ID in arc.properties and re-caching changes will enable you to view the altered 'From' email ID only in case of Report Subscriptions and Alerts. However, in case of Schedule Email and Export Email, the email ID of the user with which you login to ARC, that particular email ID will be considered as 'From' email ID. (For e.g. if you login using ken from Vanity domain, then the 'From email ID will be kquick@vanityshops.com ). In this case, if the 'From' and 'To' email accounts are from the Vanity domain, we were able to successfully send emails.