The primary aim of this project is to describe Veterans' experiences when using the Secure Messaging feature on My HealtheVet (MHV). This research is designed to explore why Veterans choose to, or not to, use the Secure Messaging feature on MHV, identify facilitators and barriers, and examine if experiences differ by health literacy or computer literacy. In addition to the interview data, findings from the usability testing provide user data about Veterans' skills and patterns when using Secure Messaging. This study was extended to conduct a mail-in quantitative survey evaluation of Veterans experiences, preferences, purposes and perceived facilitators and barriers for using, or not using Secure Messaging.