Google Workspace Email Routing (Dual Delivery)

A solution for Google Workspace to coexist with the existing email system.

If the company prefers that some employees use Google Workspace and the other employees use the existing email system, TS Cloud can help you configure the dual delivery settings so that both email systems can coexist without affecting the existing email system.

Migrating to Google Workspace doesn’t have to be a one-time changeover for all

Those who have been using Google’s cloud service would know how advanced and convenient the technology is. However, it is very hard for those who have not yet experienced it to understand the true benefits of Google’s cloud service. Human nature tends toward comfort and is hard-wired to resist change. The core argument between people who support and against Google Workspace is usually around “whether we should change over to Google Workspace completely”. Due to many ‘irreconcilable differences’ between the two parties, it is very hard to achieve a consensus. But, does it really have to be an “all-or-nothing” decision? Is it possible to migrate part of the employees to Google Workspace while keeping the others on the legacy system? These are the most urgent problem to be resolved for many companies that are considering Google Workspace.

Concern Pro-Google Workspace Anti-Google Workspace
Cost and performance In order to improve productivity, Google Workspace is imperative. Current email service has no limit on account numbers while Google Workspace is per user based pricing.
Perspective on corporate email Email together with collabration tools will improve productivity. Mailbox is just a tool to send and receive emails, thus unwilling to pay so much on it.
Accessibility in China My departement has nothing to do with China. Accessibility of Google in China is unstable, therefore risky to use.
Software literacy With Google Workspace, there’s no need to purchase Microsoft Office. I am used to Office. I have never used Google before.
Mobile working Google Workspace can be accessed anytime with any device, thus more convenient than Microsoft Office. I only use computer inside the office. There’s no need for mobile working.

“whether or not to change over to Google Workspace completely” is no longer an issue

The reason why the argument between pro and anti centers around “whether or not to change over to Google Workspace completely” is because one company is only allowed to have one “mailing address” (which is the MX record in DNS) in the world of Internet. Having said that, today’s technology allows us to set up Google Workspace email routing or dual delivery systems that run in parallel therefore making it possible for companies to have both their legacy email system and Google Workspace running together without having to abandon the legacy system and migrate all users to Google Workspace at once. This can be done by simply setting up Google Workspace email routing or dual delivery configuration on both sides as long as the legacy system supports email routing or dual delivery. Thanks to this advanced functionality, embracing a new technology is no longer an obstacle for many companies now.

“whether or not to change over to Google Workspace completely” is no longer an issue

Instead of struggling to reach consensus, just migrate whoever is ready

Your IT no longer need to spend countless hours planning for a turnkey migration project. Time to market is important to your business users and we are here to make that possible. Move a smaller group to Google Workspace almost immediately, risk free, while retaining the ability to fall back to on-prem email system, if ever need be.

Instead of struggling to reach consensus, just migrate whoever is ready


The obstacles that could not be fully implemented can be solved by partial implementation at once.


Migrating whoever is ready to migrate, your cost increases progressively and not overnight.


The familiar on-prem email system continues to work as usual while the Google Workspace users enjoy the new technologies and be able to fall back if needed.


Because the familiar on-prem email system continues to exist and operate, what risk is there?

The hybrid model of enterprise mailboxes

Since Google Workspace can work in parallel with your existing email system thus there is no need to replace everything completely. It will give your IT procurement the flexibility to decide the number of users on Google Workspace in order to meet the different purpose or needs of different teams and scenarios.

Staff that should remain on existing email system
Staff that should remain on existing email system
Those who need to deal with and regular travel to China
Low productivity staff
Senior staff and those only familiar with Outlook
Normal staff /users
Contract Staff
Blue collar staff who may not work on PC
Senior staff
General user
Those that should be on Google Workspace
Those that should be on Google Workspace
Those who do not deal with or travel to China
Younger staff, millennials, high productivity Staff
Those who yearn to use Gmail
Sales Organisation, Management Team and those who runs POC tests
Full Time Staff
White collars
Young employee
PoC, test users

Frequently Asked Questions

QHow is the migration done?


First of all, we will have to configure routing, gateway, and filtering settings from Google Workspace and then enable email forwarding from the current mail server. This means that the whole process requires settings configured on both sides. We will assist you with all the Google Workspace side of settings. You can choose to let us help you with the configuration of your current email system if it is okay to grant us the permission to log in to your system; otherwise we can also work with your outsourced vendor to have this completed.

QIs there a minimum number of accounts requirement for this Email Co-Exist Program?


Since email coexistence requires several settings to be done on both Google Workspace and the current mail server, it is best for companies of 20-30 people with a minimum of 10 Google Workspace licenses. If your company is under 20 strong, we recommend a complete changeover to Google Workspace. (For complete changeover, the configuration service fee is HK$990/user.)


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