OfficeVP supports multiple authentication methods
OfficeVP supports multiple authentication methods. Authentication validates your email with an ISP to let them know your email is not a forged identity, helping you with deliverability to the inbox. Here a great example of email forgery; I was bombarded a while back with email from what looked like was from PayPal. Telling me, I needed to login and update my banking information. Since I have a PayPal account, I knew it was not PayPal. The email actually looked real, and even had a link to a domain with the word PayPal in the URL, but the dead giveaway was "paypal.1bg66sm.com" - Paypal was in the sub domain, not the actual domain, and after examining the email header HTML authentication code, it turned out to be a forgery.