Barracuda Essentials
Using the Exclaimer Email Signature service with the Email Security Service (ESS)
If you are using the Exclaimer Signature Service with the Barracuda Email Security Service (ESS) please follow Exclaimers solution for this
https://support.exclaimer.com/hc/en-gb/articles/360028964871-How-to-setup-Exclaimer-Cloud-to-work-with-a-third-party-security-solution
This will show you how to configure your service to relay mail to Exclaimer and then have them relay it back to you and then on to ESS for delivery.
Link to this page: