How to configure the program to use it with smart host (mail relay) services
This step is optional - follow the instructions below only if you use smart host (mail relay) services in your organization.
If you use a smart host service (such as Barracuda or Mimecast) for security, archiving or anti-spam protection in your organization, you can integrate it with CodeTwo Email Signatures for Office 365. All you need to do is configure your mail flow so that messages are routed through CodeTwo cloud services (located in Microsoft Azure datacenters) before they reach your smart host (Fig. 1.).
See our Knowledge Base article for guidelines.