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uk Technology & digital loss

What to do if…
your email inbox is full and new messages are bouncing

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Free space in the email account, including Bin, Deleted Items, Trash, Spam, or Junk, then test delivery from a different address and ask key senders to resend anything important.

Do not do these things

  • Don’t click “upgrade”, “renew storage”, or payment links inside unexpected emails or pop-ups; check storage from the real app or website instead.
  • Don’t bulk-delete work, legal, finance, tenancy, medical, school, or immigration emails if you may need them later.
  • Don’t assume every missing message will appear automatically once space is freed; some messages may have bounced and may need resending.
  • Don’t try to fix the same inbox from several devices at once, because it can make it harder to track what you deleted.
  • Don’t change passwords, forwarding rules, or security settings while panicking unless you have confirmed you are inside the real provider app or website.

What to do now

  1. Use one trusted access point.
    Use a device you trust. Open the provider’s official app or type the provider’s website address yourself, rather than following a link in a warning email.

  2. Check whether the warning is real.
    Look for the storage or quota page inside your account settings. If the warning only appears in an email asking you to click a link or pay, treat it as suspicious unless the same warning appears inside the real account.

  3. Free space where it is most likely to unblock delivery.
    Start with folders that often still count towards storage:

    • Empty Bin, Deleted Items, or Trash.
    • Empty Spam or Junk.
    • Delete a few very large emails with attachments that you no longer need.
    • Empty Bin, Deleted Items, or Trash again after deleting those messages.
    • If the provider shares storage with files or photos, remove large unwanted items there too.

  4. Test delivery instead of guessing.
    Send a short test email to yourself from a different email address, or ask someone you trust to send one.

    • If it bounces, keep freeing space and test again after a short pause.
    • If the provider says storage is still updating, allow time for that update before assuming the fix failed.
    • If it arrives, reply from the full inbox to check that sending also works.

  5. Ask likely senders to resend.
    Make a short list of people or organisations that may have emailed since the warning appeared, or over the last day or two if you are not sure. Contact them through a known route and ask them to resend anything important.

  6. Prioritise time-sensitive messages.
    Check known websites or apps directly for urgent items, such as bank alerts, delivery updates, school messages, medical appointment messages, payroll emails, password resets, or verification codes. Do not use links from suspicious storage-warning emails.

  7. Use the managed-account route if this is work or school email.
    Contact IT or the helpdesk and say: “My mailbox quota has been reached and senders may be getting bounce messages.” Ask whether you should use an archive mailbox, retention process, or quota increase before deleting more.

  8. Report a suspicious storage-warning email.
    If an email claims your inbox is full and pressures you to click a link, pay, or enter your password, forward it to report@phishing.gov.uk if you can. Then delete it from your inbox.

What can wait

  • Sorting folders, labels, old newsletters, or long-term archiving rules.
  • Changing your email address everywhere.
  • Paying for more storage, unless you have verified inside the real account settings that you need it.
  • Reconstructing every missed message before delivery is working again.

Important reassurance

A full inbox warning is disruptive, but it is usually a storage and delivery problem rather than a permanent loss of the whole account. Once delivery is working again, the next practical step is simply to ask likely senders to resend important messages.

Scope note

These are first steps to stop new messages bouncing and stabilise access. Managed work, school, or organisation accounts may have deletion, archive, or retention rules, so later decisions may need help from IT or another appropriate specialist.

Important note

This guide is general information, not legal, security, financial, professional IT, or professional advice. If you see unexpected sign-ins, password reset emails you did not request, forwarding rules you did not set, or other signs of compromise, prioritise official account recovery and security support.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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