diff --git a/send.go b/send.go
index 83822bd..8e00ec7 100644
--- a/send.go
+++ b/send.go
@@ -36,7 +36,7 @@ const (
 
 // Known Workflow URL patterns for submitting messages to Microsoft Teams.
 const (
-	WorkflowURLBaseDomain = "logic.azure.com"
+	WorkflowURLBaseDomain = `^https:\/\/(?:.*\.azure-api|logic\.azure)\.(?:com|net)`
 )
 
 // DisableWebhookURLValidation is a special keyword used to indicate to