chore: add disallow domains (#894)

Author: ecmadao

mintlify/administration/sign-in-restriction.mdx

@@ -20,6 +20,43 @@ Once [SSO](/administration/sso/overview) is configured, you can [enforce SSO sig
 
 Go to **Settings** > **General**, scroll down to **Security** section. For **Workspace Domain**, you can configure allowed email domains for your workspace members. Click **Add domain** to add multiple domains as needed. After adding your domains, enable the **Members restriction** checkbox to enforce the restriction.
 
+Following domains are disallowed:
+
+- gmail.com
+- googlemail.com
+- outlook.com
+- hotmail.com
+- live.com
+- msn.com
+- yahoo.com
+- ymail.com
+- rocketmail.com
+- icloud.com
+- me.com
+- mac.com
+- aol.com
+- zoho.com
+- protonmail.com
+- gmx.com
+- gmx.net
+- mail.com
+- yandex.com
+- yandex.ru
+- fastmail.com
+- fastmail.fm
+- tutanota.com
+- 163.com
+- 126.com
+- sohu.com
+- qq.com
+- sina.com
+- sina.cn
+- aliyun.com
+- aliyun.cn
+- tom.com
+- 21cn.com
+- yeah.net
+
 ![set-domain](/content/docs/administration/sign-in-restriction/bb-security-domains.webp)
 
 Domain restriction applies to: