RMail for Outlook Desktop and Office 365

RMail for Outlook Desktop & Office 365

Installing the RMail for Outlook app adds a “Send Registered™” button to the mail compose window in Microsoft Outlook (versions 2010 or newer, or Office 365 Outlook) This add-in also works with Office 365 (if you install Microsoft Outlook onto your computer). The button will appear above or next to the traditional “Send” button and allows the user to send RMail messages. RMail for Outlook software includes the following sending options: email open tracking, proof of email delivery, encryption, electronic signature & contracting, large file transfer, PDF conversion, authentication, metadata cleaning, and more.

Main Services:

    • Track & Prove: Sends a Registered Email™ message. A Registered Receipt™ email record is then returned to the sender with court-admissible time-stamped proof of the content delivered and advanced open tracking.
    • Encrypt: Delivers files and email message body text and attachments encrypted direct to the recipient’s inbox with no need for recipients to register or click links, returning auditable proof of compliance and privacy.
    • E-Sign: Attach a document and send as a Registered Email message, auto-formatted so the recipient can use their mouse to electronically draw or type their signature on the document, returning a legally signed contract to both sender and recipient
    • Secure Large File Share: Senders can easily attach and track up to 1GB of files from Outlook or the RMail Web app. Senders can send securely to any recipient with encryption and configurable self-purging options (from 1 to 90 days) in a one-time online storage box that eliminates the risk of download recipients being able to see sender’s cloud storage file structure.
    • Disappearing Ink™: Senders can tag certain parts of an email message to disappear from within the email after delivery after a designated amount of time since sending, based on number of views, or time per view. Senders can receive verifiable proof that the recipient has viewed selected tagged parts of an email.
    • Redact Reply™: Senders can redact particularly sensitive text in a sent message such that if the recipient replies, that sensitive text is automatically removed from the reply email thread.
    • SideNote®: Makes it easy to append a private “sticky note” to a copied or blind copied recipient, so they have context as to why they were copied, and with Disappearing Ink™ enabled, that note can be set for one-time-view and to disappear from the recipient inbox after.

IMPORTANT NOTE: Please select the bit version of your Microsoft Outlook (32-bit or 64-bit). The RMail App for Outlook works on both 32-bit and 64-bit Windows so Windows bit version is not relevant.


Please follow the steps below to determine the Outlook bit version:

  1. Outlook 2013 or newer: File > Office Account > About Outlook (listed at the end of the first line on the pop-up)
  2. Outlook 2010: File > Help (listed on the first line below, “About Outlook”)

Product Tour

How to Install RMail for Outlook Desktop & Office 365

New Installation:

  1. Confirm if your Microsoft Outlook is 32-bit or 64-bit
    1. Open Outlook
    2. Outlook 2013 or newer: File > Office Account > About Outlook (listed at the end of the first line on the pop-up)
    3. Outlook 2010: File > Help (listed on the first line below, “About Outlook”)
  2. Close Microsoft Outlook
  3. Click the appropriate download button above and follow the installation wizard.

Installation Support Center

How do I know if I have 32-bit vs 64-bit Outlook?

Customer Stories

App Info


Languages Supported:

Danish, Dutch, English, French, German, Italian, Latvian, Lithuanian, Polish, Portuguese, Spanish.

Minimum Requirements:

Operating SystemWindows
Windows version7 (32/64 bit), 8 (32/64 bit), 10 (32/64 bit)
Office Version2010, 2013, 2016, 2019, Office 365 full install (32/64-bit)
Function modelOutlook client runs locally or through terminal services
Program size5MB
Program typeOutlook COM Add-In using IDTExtensibility for a shared Add-In. Shimmed to provide an isolated, unique AppDomain.
.NETFramework 4.0 or greater.
Install packageWindows Installer MSI. Installs using Visual Studio Installer technology for Windows Installer.
Additional applications needed to run or start-upNone
Specific application conflictsNone
UninstallControl Panel, Programs (clean uninstall)
DeploymentSingle user, user group or company-wide deployment
UpdatesManual upgrades only
Folder LocationC:Program Files (x86)RMail (32-bit)
C:Program FilesRMail (64-bit)
RequirementsValid inbound and outbound email account.
Administrative rights required for installation only.
Recommended email formatHTML or plain text (Rich Text not recommended)
Licensing Per user, shared group of users, or usage-based
Feature customizationOutlook ‘Options’ panel or Configuration file (XML)
“Send Registered” Button locationAbove the native Outlook “Send” button.