Secure Mail Gateway addon

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>

otc_metadata/data/services.yaml

@@ -766,6 +766,13 @@ documents:
     service_type: sfs
     title: User Guide
     type: umn
+  - hc_location: usermanual/smg
+    link: /secure-mail-gateway/umn/
+    pdf_name: smg-umn
+    rst_location: umn/source
+    service_type: smg
+    title: User Guide
+    type: umn
   - hc_location: api/smn
     html_location: docs/smn/api-ref
     link: /simple-message-notification/api-ref/
@@ -1498,6 +1505,18 @@ services:
     teams:
       - name: docs-orchestration-rw
         permission: write
+  - repositories:
+      - environment: internal
+        repo: docs/secure-mail-gateway
+        type: gitea
+      - environment: public
+        repo: opentelekomcloud-docs/secure-mail-gateway
+        type: github
+    service_category: network
+    service_title: Secure Mail Gateway
+    service_type: smg
+    teams:
+      - name: docs-network-rw
   - repositories:
       - environment: internal
         repo: docs/software-repository-container