[IMP] mail: add documentation about the SSL SMTP authentication

Purpose
=======
Add the documentation about the SSL SMTP authentication
(2 new binary arguments) and also about the new from
filter binary argument.

The goal of those new arguments is to improve the score
of the emails sent by Odoo.

Task 2367946
See odoo/odoo/pull/61853
See odoo/upgrade/pull/1903

Author: std-odoo

content/developer/reference/cmdline.rst

@@ -254,6 +254,11 @@ Emails
 
     Email address used as <FROM> when Odoo needs to send mails
 
+.. option:: --from-filter <address>
+
+    Define for which email address this SMTP configuration can be used (can be empty, a domain name or an entire email address).
+    If the sender do not match this filter, his email will be encapsulated.
+
 .. option:: --smtp <server>
 
     Address of the SMTP server to connect to in order to send mails
@@ -272,6 +277,14 @@ Emails
 
     Password to connect to the SMTP server
 
+.. option:: --smtp-ssl-certificate <SSL certificate>
+
+    SSL certificate to use for the authentication. If set, "smtp-ssl-private-key" is required.
+
+.. option:: --smtp-ssl-private-key <SSL private key>
+
+    SSL private key to use for the authentication. If set, "smtp-ssl-certificate" is required.
+
 .. _reference/cmdline/server/internationalisation:
 
 Internationalisation