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Mail flow on a co-existence setup between Google Workspace and SkyConnect

SkyConnect + Google Workspace  co-existence setup allows organizations to distribute users of a single domain across the two platforms.

In this setup,  mail flow is as explained in the sections below. NOTE: In the diagrams above, the primary domain setup in co-existence is vaultastic.io.

Incoming & mail from GSuite users to SkyConnect users



  1. The MX for the domain points to the domain hosted on Google Workspace.
  2. Mail filtering, spam & virus protection is done on the Google Workspace setup
  3. Mail for users hosted on the Google Workspace setup are delivered locally
  4. For all users not found on the Google Workspace mailing domain, mails are routed to the domain hosted on the SkyConnect platform via the SkyConnect spam gateway.  The spam gateway is configured to bypass all checks for mail orginating from Google Workspace.

Outgoing and mail flow from SkyConnect to Google Workspace users 


  1. Mail sent by users hosted on the Google Workspace platform to any external recipients are delivered directly to the Internet.
  2. Mails sent by users hosted on the SkyConnect platform to any external users are delivered directly to the Internet.
  3. Mails sent by users hosted on the SkyConnect platform to users on the same domain hosted on Google Workspace are delivered to the MX servers of Google Workspace