How to use Sendinc to encrypt your emails


Sendinc lets you send encrypted messages using its own email client and third-party programs such as Microsoft Outlook, Thunderbird, and Gmail.

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You want to send emails containing sensitive information and you need to ensure that no one other than the recipient can access or read the message. The best option is to use a method to encrypt your outgoing emails to protect them from compromise. One tool that can help in this effort is Sendinc.

Using military-grade encryption, Sendinc acts as an intermediary between you and the recipient. Your emails are stored on company servers where the recipient can access them. To exchange messages, the sender and receiver must have Sendinc accounts, which can be created for free. If you send a secure email to someone who does not have a Sendinc account, that person is prompted to create one in order to read your email.

You can send emails using the Sendinc web client, but there are other options. Microsoft Outlook users can directly send encrypted messages using the Sendinc add-in. Gmail,, Mozilla Thunderbird and Apple Mail for iOS/iPadOS users can access the Sendinc service by enabling Simple Mail Transfer Protocol (SMTP) integration.

SEE: Mobile Device Security Policy (TechRepublic Premium)

Sendinc offers three types of plans, one free and two paid.

The free plan limits you to 100MB of message storage with a maximum message size of 10MB. You can email up to 20 recipients each day, and your messages will automatically self-destruct after seven days.

At $48 per year, the Pro account offers 10GB of message storage with a maximum message size of 200MB. You can send up to 200 recipients per day and set a custom expiration date. Additionally, you can remove and audit messages. And at $48 per user per year, the Corporate account offers the same features as the Pro version but adds admin tools and other perks.

Send an email from Sendinc

To get started, go to Sendinc website and create a free account. After setting up your account, go to the Compose page to send secure email using the Sendinc web program (Figure A).

Figure A

Empty page Compose a secure message in Sendinc
Figure A: Start composing your secure message.

Enter the recipient’s name and subject, type the email message, and click the Attach Files button if you want to include a file. If you have a Pro or Corporate account, you can check the options to be notified when the message is read and the message expires when read. You can also change the self-destruct duration from the default of seven days to a different interval. When you’re done, click the Send Safely button (Figure B).

Figure B

compose a secure message in Sendinc
Figure B: Securely send emails with attachments and other sensitive information.

The recipient receives an email notification that you sent them a secure message. By clicking on the Show secure message option, they access the Sendinc site where they are asked to log in with their account. The email you sent appears with any attachments. The recipient can then reply to it, forward it, save it as a PDF or print it (Figure C).

Figure C

Sendinc secure message
Figure C: Recipients with Sendinc accounts will be able to access encrypted emails and their attachments.

Send email from Microsoft Outlook

To send an encrypted message directly from the Outlook desktop client, you need to install an add-on. First lecture Sendinc Release Notes to learn more about the overall process. On the release notes page, click the Download Outlook Add-in link. Make sure Outlook is closed. Run the downloaded executable file.

Open Outlook and start a new email. You should see Sendinc settings at the bottom of the new email. Address and compose your message. Check the Send securely via Sendinc box. You can also check the boxes to save the message to your outgoing folder and receive a copy of the email. When you’re ready, send the message. If you are not logged into your Sendinc account, you will be prompted to do so (Figure D).

Figure D

send secure email via Sendinc via Outlook
Figure D: The Sendinc add-in lets you send encrypted email through Outlook.

If your recipient is also using Outlook with the Sendinc add-in installed, they will receive the email directly with all attachments accessible (Figure E).

Figure E

receive a secure email from Sendinc
Figure E: Recipients with the Sendinc add-in will be able to receive encrypted emails in Outlook.

You can use Sendinc with other third-party email accounts, including Thunderbird, Gmail, and Apple Mail. The steps differ for each account, so your best bet is to read the specific documentation for the email account you want to use: Instructions Thunderbird, Gmail Instructions and Apple Mail Instructions.

Manage sent emails in Sendinc

Finally, you can manage your sent emails and your global account. Log in to the Compose page with your Sendinc credentials. Click on the Sending History entry to view and manage your sent emails. If you have a Pro or Corporate account, check the box for a specific email and you can set it to expire immediately.

Click on the Contacts entry to add a contact or import multiple contacts via a CSV file. Select the entries for Account Settings, Email Preferences, and Billing Details to view and manage your account settings. And click on the entry for upgrade if you have a free account and want to upgrade to a paid account (Figure F).

Figure F

Overview of billing and usage in Sendinc with upgrade option highlighted
Figure F: Upgrade your Sendinc account at any time.

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