RemarkableCloud

How to Customize Crossbox

How to configure and brand the Crossbox webmail interface on your RemarkableCloud server: custom hostname, logo, and per-user settings.

Crossbox is the webmail and collaboration suite included with RemarkableCloud’s email infrastructure. This guide covers customizing the URL, branding it for resellers, and configuring user settings.

Default access URL

Crossbox is accessible at:

https://office.protectedserver.net

Log in with your full email address and password.

Setting a custom webmail hostname

To serve Crossbox from your own domain (e.g. https://webmail.yourdomain.com):

  • Log into your RemarkableCloud client area and go to your Cloud Cube's service page.
  • Navigate to Email Settings → Crossbox Configuration or contact support with your desired webmail hostname.
  • Add a DNS CNAME record at your DNS provider: webmail.yourdomain.com → office.protectedserver.net
  • Once DNS propagates, Crossbox is accessible at your custom URL.
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    White-label branding for resellers

    If you’re reselling email hosting, you can replace the Crossbox branding with your own:

    1. Contact RemarkableCloud support with your:
      • Custom webmail URL
      • Logo file (PNG, minimum 200×60px)
      • Brand colors (hex values)
    2. We configure the white-label instance on your behalf

    Your clients see your brand: not RemarkableCloud or Crossbox.

    User settings in Crossbox

    Each user can configure their own preferences at Settings (gear icon):

    Email settings

    • Display name: name shown on outgoing emails
    • Signature: HTML or plain text signature appended to emails
    • Auto-reply: vacation/out-of-office message with date range
    • Filters: rules to sort, flag, or forward incoming mail
    • Blocked senders: automatically trash mail from specific addresses

    Notifications

    • Desktop notifications for new mail
    • Mobile push notifications (via Crossbox mobile app)

    Calendar

    • Working hours and timezone
    • Default reminder times
    • Shared calendar permissions

    Crossbox mobile apps

    Crossbox has native iOS and Android apps that sync mail, calendar, and contacts. Download from the App Store or Google Play: search “Crossbox”.

    Connect using:

    • Server: office.protectedserver.net (or your custom URL)
    • Email: your full email address
    • Password: your mailbox password
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