doc: send mail

README.md

@@ -6,6 +6,31 @@
 
 [+ Information](docker/mysqlclient/README.md)
 
+
+## Send Mail
+
+```bash
+#for testing
+duplicati-cli send-mail --send-mail-password="pass" --send-mail-to="target@mail.lan" --send-mail-username="suer@mail.lan" --send-mail-url="smtp://serveraddress:25" 
+```
+
+
+### Global Settings
+
+```bash
+
+--send-mail-any-operation=true
+--send-mail-body=%RESULT%
+--send-mail-level=all
+--send-mail-subject=Duplicati %OPERATIONNAME% report for  -> %backup-name%
+--send-mail-to=destination@mail.lan
+--send-http-result-output-format=Duplicati
+--send-mail-url=smtp://serveraddress:25
+--send-mail-password=password
+--send-mail-username=user@mail.lan
+
+```
+
 ## Scripts