Email Encryption Microsoft Office 2007 Add-on

Posted on 2013-02-04
Last Modified: 2013-02-06
Hi everyone,

I have been researching for the last two weeks for an Outlook Plugin for email encryption. I was initially looking into PGP software but I can not seem to find the right one. Ideally we were looking for software that would give our users a public key and private key.

Enigmail has all the features I am looking for but it would need to be for Outlook and not Thunderbird. Spending a little bit of money would not be an issue either.

So the Prereqs would be

- A plugin
- Not extremely expensive
- For about 5 users on the same mail domain

Thank you in advance

Question by:meshoxford
  • 3
  • 2
LVL 10

Expert Comment

Comment Utility
Outlook has this functionality built-in.  You can read about it here:
LVL 33

Expert Comment

by:Dave Howe
Comment Utility
There are three major families of encryption that interoperate with email - the first is pgp as you have noticed, and the thunderbird plugin is called enigmail. For outlook 2007, you can use but the setup is rather manual. (note, both this and enigmail use gnupg, a compatible open source program)

If you are happy to pay, the original pgp program has gone though many corporate masters and is now back with symantec. the "desktop" encryption product gives you 2003/2007/2010 office support (for a price) - they also have programs for mobile platforms so you can access your encrypted mail "on the go"

The second (referenced by rscottvan) is s/mime, and is the same technology you are familiar with from certificate protected (https) sites. Exchange/Outlook is heavily integrated with this, with the ability to centrally issue keypairs from exchange/active directory, and even standalone outlook can use s/mime (called "digital IDs" by microsoft)

Note, both of these have a near-fatal flaw. you must, before sending to anyone, obtain *their* public key, and actually persuading correspondents to do this is pretty difficult.

The third class of scheme has a large number of (non-interoperable) providers and is called "oracle based encryption" (not related to oracle the corporation). With OBE, you communicate with a central server who will give you the encryption key for the recipient *even if they don't have one* and new users are invited to visit the central server, sign up for a (free) account, and decrypt their mail using that mechanism. Subscribers of course see this as transparent - a gateway product encrypts or decrypts the mail while in transit, so that they just use outlook as normal.

Some providers are Microsoft ( EHEE ) ZixCorp ( ZixMail PGP ( GEE ) and last but certainly not least, Cisco ( CRES )

The third solution can be scarily expensive though (Zix is cheapest, cisco probably most costly), so find out how much before you sign up :)

Author Comment

Comment Utility
Thank you both for the replies.

@rsscottfan - We do not have an exchange server. Sorry I should of wrote that in my summary. We use a linux mail server exim from I am playing around with outlook at the moment.


Thank you for that well thought out response. I looked into Zix and that seems to be about 100 dollars a user a year... I am currently reading the cumps link that you sent me. Have you ever used it before? I think that I will give it a try. Let me know what you would personally recommend.

Thank you,

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

LVL 33

Accepted Solution

Dave Howe earned 500 total points
Comment Utility
cumps? no, I use thunderbird with enigmail, as we use outlook 2010 here and it isn't compatible with the newer solution. If you aren't an exchange site though (or more accurately, pop3) then you could use this also:

which is a single-host intercepting proxy that allows you to send and receive gpg encrypted mail with any pop3+smtp mail client.

Author Closing Comment

Comment Utility
Thank you for explaining everything
LVL 33

Expert Comment

by:Dave Howe
Comment Utility
You are welcome. I am just happy to see someone moving to use pgp - its an awesome system, and the core of some other solutions (such as hushmail and the debian maintainer system)

Best of luck :)

Featured Post

Enabling OSINT in Activity Based Intelligence

Activity based intelligence (ABI) requires access to all available sources of data. Recorded Future allows analysts to observe structured data on the open, deep, and dark web.

Join & Write a Comment

Article by: btan
Provide an easy one stop to quickly get the relevant information on common asked question on Ransomware in Expert Exchange.
Set OWA language and time zone in Exchange for individuals, all users or per database.
This Experts Exchange video Micro Tutorial shows how to tell Microsoft Office that a word is NOT spelled correctly. Microsoft Office has a built-in, main dictionary that is shared by Office apps, including Excel, Outlook, PowerPoint, and Word. When …
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now