diff --git a/src/Endpoints/MessagesEndpoint.php b/src/Endpoints/MessagesEndpoint.php
index 6d0a1de..1513c5c 100644
--- a/src/Endpoints/MessagesEndpoint.php
+++ b/src/Endpoints/MessagesEndpoint.php
@@ -5,6 +5,7 @@
 use Lettermint\Responses\MessageEventsResponse;
 use Lettermint\Responses\MessageListResponse;
 use Lettermint\Responses\MessageResponse;
+use Lettermint\Responses\ProcessInboundMessageResponse;
 use Lettermint\Responses\ScheduledMessageResponse;
 
 class MessagesEndpoint extends Endpoint
@@ -30,6 +31,11 @@ public function cancel(string $messageId): ScheduledMessageResponse
         return $this->hydrate(ScheduledMessageResponse::class, $this->postArray($this->path('/messages/{messageId}/cancel', ['messageId' => $messageId])));
     }
 
+    public function process(string $messageId): ProcessInboundMessageResponse
+    {
+        return $this->hydrate(ProcessInboundMessageResponse::class, $this->postArray($this->path('/messages/{messageId}/process', ['messageId' => $messageId])));
+    }
+
     public function events(string $messageId, array $query = []): MessageEventsResponse
     {
         return $this->hydrate(MessageEventsResponse::class, $this->getArray($this->path('/messages/{messageId}/events', ['messageId' => $messageId]), $query));
diff --git a/src/Responses/ProcessInboundMessageResponse.php b/src/Responses/ProcessInboundMessageResponse.php
new file mode 100644
index 0000000..617ac10
--- /dev/null
+++ b/src/Responses/ProcessInboundMessageResponse.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Lettermint\Responses;
+
+use Lettermint\Resource;
+
+/**
+ * @property array{message_id: string, status: 'queued', webhook_target_count: int} $data
+ */
+final class ProcessInboundMessageResponse extends Resource
+{
+    //
+}
diff --git a/src/Types/ApiTypes.php b/src/Types/ApiTypes.php
index deb2b15..9b4723e 100644
--- a/src/Types/ApiTypes.php
+++ b/src/Types/ApiTypes.php
@@ -7,7 +7,7 @@
  *
  * @phpstan-type ApiObject array<string, mixed>
  * @phpstan-type CursorPage array{data: list<ApiObject>, path: string|null, per_page: int, next_cursor: string|null, next_page_url: string|null, prev_cursor: string|null, prev_page_url: string|null}
- * @phpstan-type MessageStatus 'scheduled'|'pending'|'queued'|'suppressed'|'processed'|'delivered'|'opened'|'clicked'|'soft_bounced'|'hard_bounced'|'spam_complaint'|'failed'|'blocked'|'policy_rejected'|'unsubscribed'|'canceled'
+ * @phpstan-type MessageStatus 'scheduled'|'pending'|'queued'|'quarantined'|'suppressed'|'processed'|'delivered'|'opened'|'clicked'|'soft_bounced'|'hard_bounced'|'spam_complaint'|'failed'|'blocked'|'policy_rejected'|'unsubscribed'|'canceled'
  * @phpstan-type SendMailRequest array{route?: string, from: string, to: non-empty-list<string>, cc?: list<string>, bcc?: list<string>, reply_to?: list<string>, subject: string, scheduled_at?: string, headers?: array<string, string>, metadata?: array<string, string>, tag?: string|null, tags?: list<array{name: string, value: string}>, settings?: array{track_opens?: bool, track_clicks?: bool, tls?: TlsPolicy}|null, html?: string|null, text?: string|null, attachments?: list<array{filename: string, content: string, content_type?: string|null, content_id?: string|null}>}
  * @phpstan-type SendBatchMailRequest list<SendMailRequest>
  * @phpstan-type TlsPolicy 'opportunistic'|'enforced'
@@ -26,7 +26,7 @@
  * @phpstan-type MessageAttachmentData array{size: int, filename: string, content_id: string|null, content_type: string}
  * @phpstan-type MessageData array{id: string, type: MessageType, status: MessageStatus, status_changed_at: string|null, scheduled_at: string|null, tag: string|null, tags: list<array{name: string, value: string}>, from_email: string, from_name: string|null, reply_to: list<string>|null, subject: string|null, to: list<MessageRecipientData>|null, cc: list<MessageRecipientData>|null, bcc: list<MessageRecipientData>|null, attachments: list<MessageAttachmentData>|null, metadata: array<string, string>|null, spam_score?: float|int|null, spam_symbols?: list<SpamSymbol>, route_id: string, created_at: string}
  * @phpstan-type MessageEventData array{message_id: string, event: MessageEventType, tag: string|null, tags: list<array{name: string, value: string}>, metadata: array<string, mixed>|null, timestamp: string}
- * @phpstan-type MessageEventType 'scheduled'|'rescheduled'|'canceled'|'released'|'queued'|'processed'|'suppressed'|'delivered'|'auto_replied'|'soft_bounced'|'hard_bounced'|'spam_complaint'|'failed'|'blocked'|'policy_rejected'|'unsubscribed'|'opened'|'clicked'|'inbound_received'|'inbound_queued'|'inbound_spam_blocked'|'inbound_processed'|'inbound_retry'
+ * @phpstan-type MessageEventType 'scheduled'|'rescheduled'|'canceled'|'released'|'queued'|'processed'|'suppressed'|'delivered'|'auto_replied'|'soft_bounced'|'hard_bounced'|'spam_complaint'|'failed'|'blocked'|'policy_rejected'|'unsubscribed'|'opened'|'clicked'|'inbound_received'|'inbound_queued'|'inbound_spam_blocked'|'inbound_released'|'inbound_processed'|'inbound_retry'
  * @phpstan-type MessageListData array{id: string, type: MessageType, status: MessageStatus, scheduled_at: string|null, spam_score?: float|int|null, from_email: string, from_name: string|null, subject: string|null, to: list<MessageRecipientData>|null, cc: list<MessageRecipientData>|null, bcc: list<MessageRecipientData>|null, reply_to: list<string>|null, tag: string|null, tags: list<array{name: string, value: string}>, status_changed_at: string|null, created_at: string}
  * @phpstan-type MessageRecipientData array{email: string, name: string|null}
  * @phpstan-type MessageStatsData array{messages_transactional: int, messages_broadcast: int, messages_inbound: int, deliverability: float|int}
@@ -96,6 +96,7 @@
  * @phpstan-type MessageListResponse array{data: list<MessageListData>, links: list<string>, meta: array{path: string|null, per_page: int, next_cursor: string|null, next_cursor_url: string|null, prev_cursor: string|null, prev_cursor_url: string|null}}
  * @phpstan-type MessageResponse MessageData
  * @phpstan-type MessageEventsResponse array{data: list<MessageEventData>, links: list<string>, meta: array{path: string|null, per_page: int, next_cursor: string|null, next_cursor_url: string|null, prev_cursor: string|null, prev_cursor_url: string|null}}
+ * @phpstan-type ProcessInboundMessageResponse array{data: array{message_id: string, status: 'queued', webhook_target_count: int}}
  * @phpstan-type ProjectListResponse array{data: list<ProjectListData>, path: string|null, per_page: int, next_cursor: string|null, next_page_url: string|null, prev_cursor: string|null, prev_page_url: string|null}
  * @phpstan-type CreateProjectResponse array{data: ProjectData, message: string, api_token: string}
  * @phpstan-type ProjectResponse ProjectData
diff --git a/tests/Endpoints/MessagesEndpointTest.php b/tests/Endpoints/MessagesEndpointTest.php
index 41fd84c..276f69c 100644
--- a/tests/Endpoints/MessagesEndpointTest.php
+++ b/tests/Endpoints/MessagesEndpointTest.php
@@ -33,6 +33,12 @@
     expect($this->endpoint->cancel('message-id')->status)->toBe('canceled');
 });
 
+test('it processes a quarantined inbound message', function () {
+    $this->httpClient->shouldReceive('post')->once()->with('/v1/messages/message-id/process', [], [])->andReturn(['data' => ['message_id' => 'message-id', 'status' => 'queued', 'webhook_target_count' => 1]]);
+
+    expect($this->endpoint->process('message-id')->data['status'])->toBe('queued');
+});
+
 test('it retrieves message events', function () {
     $query = ['include_machine_events' => true];
     $this->httpClient->shouldReceive('get')->once()->with('/v1/messages/message-id/events', $query)->andReturn(['data' => []]);
diff --git a/tests/SdkCoverageTest.php b/tests/SdkCoverageTest.php
index d6c8452..640397e 100644
--- a/tests/SdkCoverageTest.php
+++ b/tests/SdkCoverageTest.php
@@ -29,6 +29,7 @@
         ['team', 'message.show', MessagesEndpoint::class, 'retrieve'],
         ['team', 'rescheduleMessage', MessagesEndpoint::class, 'reschedule'],
         ['team', 'cancelScheduledMessage', MessagesEndpoint::class, 'cancel'],
+        ['team', 'processInboundMessage', MessagesEndpoint::class, 'process'],
         ['team', 'message.events', MessagesEndpoint::class, 'events'],
         ['team', 'message.source', MessagesEndpoint::class, 'source'],
         ['team', 'message.html', MessagesEndpoint::class, 'html'],
@@ -67,7 +68,7 @@
         ['team', 'webhook.showDelivery', WebhooksEndpoint::class, 'delivery'],
     ];
 
-    expect($operations)->toHaveCount(52);
+    expect($operations)->toHaveCount(53);
 
     $missing = [];