diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1140cd06..00b904a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Fixed
 - Fixed missing notifications in some cases ([#159])
+- Fixed incorrect blocking of MMS messages in some rare cases ([#644])
 
 ## [1.7.0] - 2025-12-16
 ### Added
@@ -221,6 +222,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#574]: https://github.com/FossifyOrg/Messages/issues/574
 [#600]: https://github.com/FossifyOrg/Messages/issues/600
 [#610]: https://github.com/FossifyOrg/Messages/issues/610
+[#644]: https://github.com/FossifyOrg/Messages/issues/644
 
 [Unreleased]: https://github.com/FossifyOrg/Messages/compare/1.7.0...HEAD
 [1.7.0]: https://github.com/FossifyOrg/Messages/compare/1.6.0...1.7.0
diff --git a/app/src/main/kotlin/org/fossify/messages/receivers/MmsReceiver.kt b/app/src/main/kotlin/org/fossify/messages/receivers/MmsReceiver.kt
index 04ad1e60..54a7c422 100644
--- a/app/src/main/kotlin/org/fossify/messages/receivers/MmsReceiver.kt
+++ b/app/src/main/kotlin/org/fossify/messages/receivers/MmsReceiver.kt
@@ -7,7 +7,6 @@ import com.klinker.android.send_message.MmsReceivedReceiver
 import org.fossify.commons.extensions.baseConfig
 import org.fossify.commons.extensions.getMyContactsCursor
 import org.fossify.commons.extensions.isNumberBlocked
-import org.fossify.commons.extensions.normalizePhoneNumber
 import org.fossify.commons.extensions.showErrorToast
 import org.fossify.commons.helpers.SimpleContactsHelper
 import org.fossify.commons.helpers.ensureBackgroundThread
@@ -27,8 +26,7 @@ import org.fossify.messages.models.Message
 class MmsReceiver : MmsReceivedReceiver() {
 
     override fun isAddressBlocked(context: Context, address: String): Boolean {
-        val normalizedAddress = address.normalizePhoneNumber()
-        if (context.isNumberBlocked(normalizedAddress)) return true
+        if (context.isNumberBlocked(address)) return true
         if (context.baseConfig.blockUnknownNumbers) {
             context.getMyContactsCursor(favoritesOnly = false, withPhoneNumbersOnly = true).use {
                 val isKnownContact = SimpleContactsHelper(context).existsSync(address, it)