How to Stop Unwanted Emails on Android

Searching for how to stop unwanted emails on Android usually leads to advice that is too generic to be useful: 'block the sender' or 'mark it as spam.' The real answer depends entirely on which mail app you have open, because Android has no system-wide email filter. Gmail, Samsung Email, and Outlook for Android each run their own blocked-sender list, independent of one another.

This post maps the exact controls in each of those three apps — what the steps are, what each one actually does, and where the ceiling is. It also covers the cases where no phone-side control is enough and the only real fix requires a desktop browser.

The Short Answer#

Android does not have a system-level email blocker. Email apps on the platform connect individually to your Gmail, Outlook, Yahoo, or IMAP account and each maintain their own block list. Blocking an address in the Gmail app has no effect in Samsung Email, and blocking in Samsung Email has no effect in Outlook. There is no setting on the phone that covers all three at once.

What every Android mail app can do: move a specific message to spam, block a specific address, and — in Gmail — request removal from a mailing list. What none of them can do from the phone: create filter rules that run on the mail server and stop messages before they arrive. Filter creation for Gmail requires mail.google.com in a desktop browser. Outlook rules are set at outlook.live.com.

For the majority of people dealing with one or two persistent senders, the block and report spam controls in their primary app are enough. The table in the Platform Differences section shows exactly what each app provides.

Before You Start: Three Things Android Email Gets Wrong#

Three facts about Android email that cause most of the confusion.

First: there is no OS-level email filter. Android has a unified Blocked Numbers list for calls and texts, but nothing equivalent for email. Every mail app handles blocking on its own. You cannot set a block in Android Settings and have it apply everywhere.

Second: Gmail and Samsung Email are completely isolated. On a Samsung Galaxy device with both apps installed, you are managing two separate blocked-sender lists. A block you set in the Gmail app does not appear in Samsung Email, and the reverse is equally true. If you move between apps, you need to set the same block in each one.

Third: the Gmail Android app cannot create filters. It exposes block and report spam controls for individual addresses, but the filter builder — the tool that lets you write rules like 'delete all mail from this domain' or 'skip the inbox for mail with this subject' — is only available at mail.google.com on a desktop or tablet browser. Once a filter is created on the web, it runs on your Gmail account across every device, including the phone.

Steps in the Gmail Android App#

The Gmail Android app provides three tools for handling unwanted mail: blocking a sender, reporting spam, and unsubscribing from a list. All three apply to Gmail and Google Workspace accounts. If you have a non-Gmail IMAP account connected to the Gmail app, the block and spam controls may not carry through to the remote server.

1. 1

   Block a specific sender

   Open the email. Tap the three-dot menu (the overflow icon at the top right of the message view). Tap Block [sender name]. Confirm if prompted. All future mail from that exact address is automatically moved to your Spam folder. The block is saved to your Gmail account and applies across every device and app signed in to the same account — it is not phone-local.

2. 2

   Report spam

   Open the email. Tap the three-dot menu. Tap Report spam. Gmail moves the message to Spam and records your report as a signal for its spam classifier. To report multiple threads without opening each one: tap the sender's profile picture in the inbox to select the thread, then tap the three-dot menu at the top of the screen and choose Report spam. This works on any number of selected threads at once.

3. 3

   Unsubscribe from a mailing list

   If the sender includes a List-Unsubscribe header — which most legitimate marketing platforms include by default — you will see an Unsubscribe link displayed next to the sender's name in the message header. Tap it, then confirm in the pop-up. Gmail sends a removal request on your behalf and moves the message to Trash. Allow a few business days for the sender's system to process the removal before expecting results.

4. 4

   Create filter rules — desktop browser required

   The Gmail Android app has no filter builder. To create a rule that archives, deletes, or labels mail matching a pattern: open mail.google.com in a desktop or tablet browser. Go to Settings, then See all settings, then the Filters and Blocked Addresses tab. Click Create a new filter. Rules set here run server-side on your Gmail account and apply across every device, including the phone.

Steps in the Samsung Email App#

Samsung Email is the pre-installed mail app on Galaxy devices. It supports Gmail, Outlook, Yahoo, Exchange, and generic IMAP accounts. Crucially, it manages its own blocked-sender list entirely separate from all of those providers — a block you set here lives in the app, not in your Gmail or Outlook account.

1. 1

   Block a sender

   Open the email from the sender you want to block. Tap the three-dot menu at the top right of the message. Tap Block address. Confirm in the pop-up. Future mail from that address is routed to Samsung Email's Spam folder automatically. Samsung Email deletes Spam folder contents after a set period.

2. 2

   Mark as spam

   Open the email. Tap the three-dot menu. Tap Move to spam. This files the message in Samsung Email's Spam folder and trains the app's local filter. Note that this is a client-side action — it does not mark the message as spam in your Gmail or Outlook account, so the provider's own filter does not receive this signal.

3. 3

   Review or clear your block list

   Open Samsung Email and tap the three-line menu (hamburger icon) at the top left. Tap Settings. Select your account. Look for Blocked addresses or Spam addresses — the exact label depends on your Samsung One UI version. From here you can view all blocked addresses and remove any that should no longer be blocked.

Steps in Outlook for Android#

Outlook for Android combines the junk report and the sender block into a single flow called Report junk. Because the block is processed at the Outlook account level, it applies across every device and app connected to the same Outlook or Microsoft 365 account.

1. 1

   Report junk and block the sender

   Open the email. Tap the three-dot menu in the top toolbar. Tap Report junk. In the bottom sheet that appears, tap Block Sender. Tap Block Sender a second time to confirm. Outlook moves the message to your Junk folder and records the block against your account. Future mail from that address is routed to Junk.

2. 2

   Manage blocked senders and junk settings

   For full control over your junk email settings — including removing addresses from the blocked list or adjusting the junk filter level — open outlook.live.com in a browser. Go to Settings, then Mail, then Junk email. Changes here apply to your Outlook account on every device.

Platform Differences at a Glance#

The three apps address unwanted email in different ways and at different scopes. The most important difference is not the steps themselves but where each block lives: Gmail's block applies account-wide, Samsung Email's block is app-local, and Outlook's block applies account-wide.

What to Do When the Standard Controls Don't Work#

There are three situations where blocking and reporting spam leave the problem unsolved.

The sender is rotating addresses. A block targets the exact address you blocked. When the same sender sends from a slightly different address each time — a common technique among high-volume spam operations — the block does not catch the new address. The fix is a domain-level filter, which requires a desktop browser. In Gmail, go to mail.google.com, open Settings, See all settings, Filters and Blocked Addresses, and create a new filter with the domain in the From field (for example, @spamdomain.com). Set the action to skip the inbox and delete. This filter runs on your Gmail account across every device without any further maintenance.

The newsletter keeps arriving after you unsubscribed. Legitimate senders must honour removal requests within ten business days under CAN-SPAM. If mail is still arriving after two weeks, the sender is not complying. Build a filter on the sender's address or a phrase that appears in every subject line, set it to delete automatically, and the messages stop reaching your inbox regardless of what the sender does. Again, Gmail filter creation requires mail.google.com on desktop.

You blocked the address in Gmail but still see the mail in Samsung Email. These are independent lists on the same phone. Open Samsung Email, find a message from the same sender, tap the three-dot menu, and tap Block address. There is no way to sync the two lists automatically — you have to block separately in each app.

A Faster Way to Handle Ongoing Volume#

The steps above work well when you are dealing with a handful of known senders. When the volume is high enough that you are blocking addresses faster than they rotate, or when you are managing several accounts across two or three apps, individual blocks stop being a practical solution.

We build AI Emaily — and on Android it ships as a home-screen PWA, not a native Play Store app (a native Android app is on the roadmap). The PWA connects to your Gmail or Outlook account at the server level and applies AI-driven spam and cold-email filtering before messages reach your inbox. Because filtering happens at the account integration layer, it applies across every device and app signed in to that account — including the Gmail app and Samsung Email. There is no block list to maintain: the classifier works on sender behaviour and domain patterns rather than individual addresses, so rotating senders do not reset it. The spam protection page linked below covers how the classifier works in detail.

If you are dealing with one or two persistent senders rather than ongoing volume, a well-placed Gmail filter on mail.google.com is the right tool — free, permanent, and low maintenance. Start there.