When using Rebel Cloud Email, emails that appear to be missing or "disappearing" from Webmail (mail.rebel.com) are almost always tied to one of two causes:
- Webmail Inbox Categories (Tabs): Emails are successfully arriving on the server, but the Webmail interface has automatically sorted them into secondary category tabs like Social or Promotions instead of your primary Inbox view.
- Local POP Settings: An external email application on a computer, phone, or tablet is connecting via POP and instructing the server to delete messages after downloading them.
Use this guide to diagnose where your messages are going and ensure your mailboxes behave consistently across all devices.
Quick Diagnostic Checklist
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Symptom 1: You are logged into Webmail (
mail.rebel.com) and your primary Inbox looks empty or is missing specific messages.- Look above your message list for category tabs such as Social, Promotions, or Commercial.
- If your missing messages are located in one of these tabs, follow Section 1 below to view them or turn tabs off entirely.
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Symptom 2: Messages appear in your desktop app or phone, but are completely gone from all Webmail folders.
- One of your devices is connected using POP and is set to wipe messages from the cloud server upon download. See Section 2 and Section 3.
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Symptom 3: You access email across multiple computers, laptops, or phones and behavior is inconsistent.
- The device with the shortest deletion timer controls when messages disappear from the cloud. See Section 4.
1. Webmail Inbox Categories & Tabs (Empty Inbox Symptom)
Rebel Cloud Webmail includes automated category sorting that routes commercial offers, automated notices, and neighborhood or community updates (such as Nextdoor, Facebook, or LinkedIn) into separate horizontal tabs above your inbox.
If an incoming email was delivered to your account but is missing from your main message list, it was likely routed to one of these tabs.
How to Turn Off Categories (Unified Single Inbox View)
If you prefer all incoming emails to land in one chronological list without automated tab sorting:
- Log in to Rebel Webmail at mail.rebel.com.
- Click the Settings (gear) icon in the top-right corner.
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Locate Inbox categories (or Tabs) and toggle the switch to Off.
- Return to your Inbox. All messages previously filed under Social or Promotions will now display directly in your main inbox view.
Note: Inbox categories are managed per individual mailbox. If you manage multiple email accounts, repeat these steps inside each account's Webmail settings.
2. POP vs. IMAP and Server Retention Timers
Rebel Cloud servers do not enforce automatic time-based deletions on your inbox. Stored messages remain on the server indefinitely until you manually delete them or reach your package storage quota.
If emails are disappearing from Webmail shortly after arriving, a local email client is commanding the server to remove them via POP.
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IMAP (Recommended): Creates a live, two-way mirror between all your devices and the cloud server. Reading, moving, or deleting an email synchronizes across your phone, computer, and Webmail automatically.
- POP: Downloads incoming messages directly to your local computer hard drive. By default, many POP clients instruct the server to purge the cloud copy immediately upon retrieval, making it disappear from Webmail and any other devices.
3. Configuring "Leave a Copy on Server" in Your Email App
Because POP settings live entirely inside the email software installed on your computer, phone, or tablet—and not on Rebel's servers—retention preferences must be configured within your specific application.
Look for an option labeled "Leave a copy of messages on the server" or "Remove copy from server after [X] days" inside your mail application's account settings:
- To retain emails permanently in Webmail: Enable "Leave a copy on the server" and uncheck any automatic day-based deletion rules.
- To keep a temporary safety window (e.g., 7 or 14 days): Enable "Leave a copy on the server" and choose your desired timeframe so your app commands the server to clean up old mail only after that buffer period has passed.
Official Vendor Documentation & Setup Guides
Because operating system and application updates frequently modify menus, refer directly to your software provider's official support documentation for current version-specific steps:
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Apple Mail (macOS & iOS): Review Apple Support: Mail Account Settings for adjusting incoming server retention rules and message removal preferences on Mac, iPhone, and iPad.
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Microsoft Outlook (Windows & Mac): Review Microsoft Support: Read POP3 email messages on multiple computers for configuring message delivery retention under your Outlook profile.
- Mozilla Thunderbird: Review Mozilla Support: Thunderbird Server Settings for instructions on setting "Leave messages on server" and specifying retention day thresholds.
4. Multi-Device Conflict Rules (The "Shortest Timer Wins")
If you check the same POP email address across more than one computer, laptop, or mobile device:
- The shortest timer controls the server: If Computer A is configured to hold emails on the server for 7 days, but Computer B is set to delete emails after 1 day (or immediately upon download), the moment Computer B connects, the cloud inbox will be cleared out.
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Configure secondary devices to never delete: If you check a POP account on secondary laptops or phones, disable server deletion entirely on those devices so only your primary workstation manages server cleanups.
- Local moves and deletions: Moving or deleting an email inside a local folder on your computer's mail app will not affect Webmail unless your software specifically has a "Delete from server when deleted locally" option enabled.
Frequently Asked Questions (FAQ)
Why did my Webmail show zero emails even though my computer hasn't downloaded them yet?
Check your Social or Promotions category tabs in Webmail. Automated group updates, notifications, and newsletters frequently land there. Disabling "Inbox categories" in Webmail settings instantly routes all incoming mail into your primary view.
Does Rebel Cloud automatically delete my emails after 7 days?
No. Rebel Cloud stores your email indefinitely as long as your mailbox stays within its storage quota. A 7-day window usually points to a local POP retention setting configured in your desktop mail app, or to backend server delivery logs (which retain forensic diagnostic receipts for 7 rolling days).
If I read an email on my computer using POP, why does it still show as unread in Webmail?
POP is a one-way download protocol. It downloads a physical copy of the email file to your hard drive, but cannot synchronize read/unread flags, custom folders, or tags back to the server. Two-way synchronization requires IMAP.
Can I use POP on my computer and IMAP on my phone for the same mailbox?
While technically possible, it is not recommended. If your computer downloads via POP and deletes messages from the server, those emails will immediately vanish from your phone's IMAP inbox during its next synchronization. If you must use POP, verify that "Leave a copy on the server" is active on every computer checking the account.
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