Why Your iPhone Screens Texts From Unknown Senders

Last updated on November 6th, 2026 at 01:47 pm

After an iOS update, Messages may start sorting texts from numbers you don’t know into a separate Unknown Senders list, so a text you were expecting seems to vanish. That is screening, not blocking: nothing is deleted, the messages simply skip your main list and, in some regions, arrive without a notification. Tap the Filters button at the top of Messages and choose Unknown Senders to see them.

Why Messages moved some texts

On iOS 26 and later the feature is called Screen Unknown Senders. On iOS 18 and earlier it was Filter Unknown Senders. Either way, a message from someone who isn’t in your Contacts (and whom you haven’t messaged before) goes to its own list instead of the main conversation list.

Apple says Screen Unknown Senders is off by default, but if you had Filter Unknown Senders turned on before you updated, the new setting is switched on for you. That is why many people only notice it after an update, often when a delivery text or a one-time code goes missing.

Screening is different from blocking. A blocked number can’t reach you at all; a screened sender’s message arrives and waits in its list until you look. If you want to know what the other person sees when you do block them, read whether someone knows you blocked them on iPhone.

Find the messages that were moved

1. Open Messages.
2. Tap the Filters button at the top of the conversation list.
3. Tap Unknown Senders to see screened texts. If you can’t find a message there, check Spam in the same menu.
4. To go back to your normal list, tap the Filters button again, then tap Messages.

On some regions and carriers you may also see Transactions and Promotions lists in the same menu (more on those below).

Turn screening on or off

iOS 26 and later

1. Open Settings and tap Apps, then Messages.
2. Scroll to the Unknown Senders section.
3. Turn Screen Unknown Senders on or off.

Shortcut: in Messages, tap Filters and then Manage Filtering to reach the same switches.

iOS 18 and earlier

1. Open Settings and tap Messages (on iOS 18, go through Apps first).
2. Scroll down to Message Filtering.
3. Turn Filter Unknown Senders on or off. Any SMS filtering app you’ve installed also appears in this part of Messages settings.

Before you switch screening off, open the Unknown Senders list once and deal with anything waiting there. While you’re in Messages settings, you can also turn off the subject field in text messages if your compose box has grown an extra line.

Keep screening but still hear from people who matter

You don’t have to choose between a quiet phone and missing important texts. There are three ways to let the right messages through.

• Mark as Known. Open the conversation in Unknown Senders and tap Mark as Known. Future texts from that number go to your main list. Apple notes that just replying does not mark the sender as known, which surprises a lot of people. Once you’ve replied to a sender three or more times, though, Apple says message filtering no longer applies to them.
• Add them to Contacts. Saving the number as a contact has the same effect and gives you a name and photo in the list. To see those photos beside conversations, you can show contact photos in Messages.
• Allow some notifications. Go to Settings > Apps > Messages > Unknown Senders > Allow Notifications. Apple lists Time Sensitive, Personal, Transactions and Promotions as choices, and Apple says these choices are adjustable in the United States, Brazil and India (elsewhere, unknown senders notify by default). Messages you allow this way also stay in the main list for eight hours.

Time Sensitive messages, such as verification codes, notify you by default even with screening on. Example: Alex uses screening to keep marketing texts quiet but kept missing his dentist’s reminders, which come from a different number each time. Turning on Personal notifications for unknown senders fixed it without letting promotions back in.

Codes, promotions and spam lists

The Unknown Senders list sits beside two other kinds of filtering, and they’re easy to confuse:

• Text Message Filter sorts SMS, MMS and RCS texts into Transactions (orders, banking, deliveries) and Promotions. It may only appear in some regions or with certain carriers or filter apps. Apple says it isn’t applied to senders you’ve replied to three or more times.
• Filter Spam sends likely junk to a separate Spam list. If a real message ends up there, open it, tap Not Spam, then Move to Messages. Spam filtering is on by default; the switch is in Messages under Filters > Manage Filtering.

If you want every text to arrive and alert you the old way, turn off Screen Unknown Senders, turn off Text Message Filter (if you have it) and turn off Filter Spam. For texts you never want to see, report them as spam or block the number from the conversation.

When a known person or a code still lands in the wrong place

Problem	Likely reason	What to do
A friend’s texts land in Unknown Senders	Their number isn’t saved, or it’s saved in a different format (missing country code)	Save the number they text from, or tap Mark as Known
A contact’s iMessages come from an email address	iMessage can send from an Apple Account email, and only the phone number is in Contacts	Add the email address to their contact card
Bank or delivery texts are missing	Businesses use many short codes and numbers	Check Unknown Senders, Transactions and Spam; mark each number as known
No alert for a new person’s message	Notifications for unknown senders are limited in your region’s settings	Allow Personal notifications, or turn screening off
A real message is in Spam	Filter Spam flagged it	Open it and mark it as not spam

If a message shows “Delivered” on your side but the other person says they never saw it, it may be sitting in their Unknown Senders list. Here’s what Delivered means on iPhone.

Questions people ask about unknown sender screening

Does screening delete messages after a while?

Screening itself doesn’t delete anything. Messages stay in Unknown Senders until you delete them, unless Keep Messages in Messages settings is set to anything other than Forever, which removes older conversations everywhere in Messages.

Does it cover iMessage and ordinary texts?

On iOS 26 and later, yes: unknown senders are screened whether the message arrives as an iMessage (blue bubble) or as an SMS, MMS or RCS text (green bubble). If you’re not sure iMessage is working on your phone, check that iMessage is turned on. On iOS 18 and earlier, Apple describes the older filter as working with iMessage.

Does the sender know their message was screened?

Apple doesn’t describe any notice to the sender. Because the message does reach your phone, an iMessage can still show Delivered on their side.

Is this the same as silencing unknown callers?

No. Screening only affects Messages. Calls from unknown numbers have their own setting; see how to silence unknown callers on an iPhone 15.

If you rely on texts from new numbers (job applications, a doctor’s office, school alerts), a good middle ground is to keep screening on, allow Time Sensitive and Personal notifications, and glance at the Unknown Senders list once a day. Apple’s support page on viewing conversations from unknown senders lists the current options for your region.