diff --git a/src/main/java/com/haru/api/domain/meeting/service/MeetingCommandServiceImpl.java b/src/main/java/com/haru/api/domain/meeting/service/MeetingCommandServiceImpl.java
index 8e6a8730..afb1528c 100644
--- a/src/main/java/com/haru/api/domain/meeting/service/MeetingCommandServiceImpl.java
+++ b/src/main/java/com/haru/api/domain/meeting/service/MeetingCommandServiceImpl.java
@@ -139,7 +139,8 @@ public void updateMeetingTitle(User user, Meeting meeting, MeetingRequestDTO.upd
 
         meeting.updateTitle(request.getTitle());
 
-        markdownFileUploader.updateFileTitle(meeting.getProceedingPdfKeyName(), request.getTitle());
+        markdownFileUploader.updateFileTitle(meeting.getProceedingPdfKeyName(), request.getTitle() + ".pdf");
+        markdownFileUploader.updateFileTitle(meeting.getProceedingWordKeyName(), request.getTitle() + ".docx");
 
         meetingRepository.save(meeting);
     }
diff --git a/src/main/java/com/haru/api/domain/moodTracker/controller/MoodTrackerController.java b/src/main/java/com/haru/api/domain/moodTracker/controller/MoodTrackerController.java
index faa5353a..ce951f98 100644
--- a/src/main/java/com/haru/api/domain/moodTracker/controller/MoodTrackerController.java
+++ b/src/main/java/com/haru/api/domain/moodTracker/controller/MoodTrackerController.java
@@ -255,7 +255,7 @@ public ApiResponse<MoodTrackerResponseDTO.ReportDownLoadLinkResponse> downloadLi
 
     @PostMapping("/{mood-tracker-hashed-Id}/report-test")
     @Operation(
-            summary = "분위기 트래커 설문 리포트 즉시 생성 테스트 API",
+            summary = "분위기 트래커 설문 리포트 즉시 생성 API",
             description = "# [v1.0 (2025-07-26)](https://www.notion.so/23f5da7802c58080b4a5e6d24b47d924) 해당 ID의 분위기 트래커 설문 리포트를 즉시 생성합니다."
     )
     @Parameters({
@@ -274,7 +274,7 @@ public  ApiResponse<Void> generateMoodTrackerReportTest (
 
     @PostMapping("/{mood-tracker-hashed-Id}/report-file-thumbnail-test")
     @Operation(
-            summary = "분위기 트래커 설문 리포트, 파일, 썸네일 즉시 생성 테스트 API",
+            summary = "분위기 트래커 설문 리포트, 파일, 썸네일 즉시 생성 테스트 API + redis에서 제외하여 마감일시에 중복 생성 불가",
             description = "# [v1.0 (2025-08-14)](https://www.notion.so/24f5da7802c58019a1f7d9c8e882226e) 해당 ID의 분위기 트래커 설문 리포트를 즉시 생성합니다."
     )
     @Parameters({
diff --git a/src/main/java/com/haru/api/domain/moodTracker/service/MoodTrackerCommandServiceImpl.java b/src/main/java/com/haru/api/domain/moodTracker/service/MoodTrackerCommandServiceImpl.java
index ee51f0df..fc9b30af 100644
--- a/src/main/java/com/haru/api/domain/moodTracker/service/MoodTrackerCommandServiceImpl.java
+++ b/src/main/java/com/haru/api/domain/moodTracker/service/MoodTrackerCommandServiceImpl.java
@@ -19,6 +19,7 @@
 import com.haru.api.global.apiPayload.code.status.ErrorStatus;
 import com.haru.api.global.apiPayload.exception.handler.*;
 import com.haru.api.global.util.HashIdUtil;
+import com.haru.api.infra.redis.RedisReportConsumer;
 import com.haru.api.infra.redis.RedisReportProducer;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -52,6 +53,7 @@ public class MoodTrackerCommandServiceImpl implements MoodTrackerCommandService
 
     private final MoodTrackerReportService moodTrackerReportService;
     private final RedisReportProducer redisReportProducer;
+    private final RedisReportConsumer redisReportConsumer;
 
     private final HashIdUtil hashIdUtil;
 
@@ -318,6 +320,10 @@ public void generateReportTest(
     public void generateReportFileAndThumbnailTest(
             MoodTracker moodTracker
     ) {
+        // 중복 처리 제외
+        redisReportConsumer.removeFromQueue(moodTracker.getId());
+
+        // 즉시 생성
         moodTrackerReportService.generateAndUploadReportFileAndThumbnail(moodTracker.getId());
     }
 }
diff --git a/src/main/java/com/haru/api/domain/snsEvent/controller/SnsEventController.java b/src/main/java/com/haru/api/domain/snsEvent/controller/SnsEventController.java
index aabe6115..b20a4484 100644
--- a/src/main/java/com/haru/api/domain/snsEvent/controller/SnsEventController.java
+++ b/src/main/java/com/haru/api/domain/snsEvent/controller/SnsEventController.java
@@ -4,6 +4,7 @@
 import com.haru.api.domain.snsEvent.dto.SnsEventResponseDTO;
 import com.haru.api.domain.snsEvent.entity.SnsEvent;
 import com.haru.api.domain.snsEvent.entity.enums.Format;
+import com.haru.api.domain.snsEvent.entity.enums.InstagramRedirectType;
 import com.haru.api.domain.snsEvent.entity.enums.ListType;
 import com.haru.api.domain.snsEvent.service.SnsEventCommandService;
 import com.haru.api.domain.snsEvent.service.SnsEventQueryService;
@@ -56,19 +57,20 @@ public ApiResponse<?> instagramRedirectUri(
     }
 
     @Operation(
-            summary = "인스타그램 연동 API [v1.1 (2025-08-07)]",
-            description = "# [v1.1 (2025-08-07)](https://www.notion.so/API-21e5da7802c581cca23dff937ac3f155?p=23f5da7802c5803b98abe74d511c2cf4&pm=s)" +
+            summary = "인스타그램 연동 API [v1.1 (2025-08-21)]",
+            description = "# [v1.1 (2025-08-21)](https://www.notion.so/API-21e5da7802c581cca23dff937ac3f155?p=23f5da7802c5803b98abe74d511c2cf4&pm=s)" +
                     " 인스타그램 로그인 후 인증 서버로부터 받은 code를 header에 넣어주시고, workspaceId를 Path Variable로 넣어주세요."
     )
     @PostMapping("/{workspaceId}/link-instagram")
     public ApiResponse<SnsEventResponseDTO.LinkInstagramAccountResponse> linkInstagramAccount(
             @RequestHeader("code") String code,
             @PathVariable String workspaceId,
+            @RequestParam InstagramRedirectType instagramRedirectType,
             @Parameter(hidden = true) @AuthWorkspace Workspace workspace
     ) {
         System.out.println("Received accessToken: " + code);
         return ApiResponse.onSuccess(
-                snsEventCommandService.getInstagramAccessTokenAndAccount(code, workspace)
+                snsEventCommandService.getInstagramAccessTokenAndAccount(code, workspace, instagramRedirectType)
         );
     }
 
diff --git a/src/main/java/com/haru/api/domain/snsEvent/entity/enums/InstagramRedirectType.java b/src/main/java/com/haru/api/domain/snsEvent/entity/enums/InstagramRedirectType.java
new file mode 100644
index 00000000..21934023
--- /dev/null
+++ b/src/main/java/com/haru/api/domain/snsEvent/entity/enums/InstagramRedirectType.java
@@ -0,0 +1,5 @@
+package com.haru.api.domain.snsEvent.entity.enums;
+
+public enum InstagramRedirectType {
+    ONBOARDING, WORKSPACE
+}
diff --git a/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandService.java b/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandService.java
index cda950e2..ced6aef3 100644
--- a/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandService.java
+++ b/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandService.java
@@ -4,6 +4,7 @@
 import com.haru.api.domain.snsEvent.dto.SnsEventResponseDTO;
 import com.haru.api.domain.snsEvent.entity.SnsEvent;
 import com.haru.api.domain.snsEvent.entity.enums.Format;
+import com.haru.api.domain.snsEvent.entity.enums.InstagramRedirectType;
 import com.haru.api.domain.snsEvent.entity.enums.ListType;
 import com.haru.api.domain.user.entity.User;
 import com.haru.api.domain.workspace.entity.Workspace;
@@ -11,7 +12,7 @@
 public interface SnsEventCommandService {
     SnsEventResponseDTO.CreateSnsEventResponse createSnsEvent(User user, Workspace workspace, SnsEventRequestDTO.CreateSnsRequest request);
 
-    SnsEventResponseDTO.LinkInstagramAccountResponse getInstagramAccessTokenAndAccount(String code, Workspace workspace);
+    SnsEventResponseDTO.LinkInstagramAccountResponse getInstagramAccessTokenAndAccount(String code, Workspace workspace, InstagramRedirectType instagramRedirectType);
 
     void updateSnsEventTitle(User user, SnsEvent snsEvent, SnsEventRequestDTO.UpdateSnsEventRequest request);
 
diff --git a/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandServiceImpl.java b/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandServiceImpl.java
index 81dedc0e..f0afaef0 100644
--- a/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandServiceImpl.java
+++ b/src/main/java/com/haru/api/domain/snsEvent/service/SnsEventCommandServiceImpl.java
@@ -8,6 +8,7 @@
 import com.haru.api.domain.snsEvent.entity.SnsEvent;
 import com.haru.api.domain.snsEvent.entity.Winner;
 import com.haru.api.domain.snsEvent.entity.enums.Format;
+import com.haru.api.domain.snsEvent.entity.enums.InstagramRedirectType;
 import com.haru.api.domain.snsEvent.entity.enums.ListType;
 import com.haru.api.domain.snsEvent.repository.ParticipantRepository;
 import com.haru.api.domain.snsEvent.repository.SnsEventRepository;
@@ -170,14 +171,18 @@ public SnsEventResponseDTO.CreateSnsEventResponse createSnsEvent(
     @Transactional
     public SnsEventResponseDTO.LinkInstagramAccountResponse getInstagramAccessTokenAndAccount(
             String code,
-            Workspace workspace
+            Workspace workspace,
+            InstagramRedirectType instagramRedirectType
     ) {
         String shortLivedAccessToken;
         String longLivedAccessToken;
         Map<String, Object> userInfo;
         try {
             // 1. Access Token 요청
-            shortLivedAccessToken = instagramOauth2RestTemplate.getShortLivedAccessTokenUrl(code);
+            shortLivedAccessToken = instagramOauth2RestTemplate.getShortLivedAccessTokenUrl(
+                    code,
+                    instagramRedirectType
+            );
             // 2. 단기 토큰을 장기(Long-Lived) 토큰으로 교환
             longLivedAccessToken = instagramOauth2RestTemplate.getLongLivedAccessToken(shortLivedAccessToken);
             // 3. 장기 토큰으로 사용자 계정 정보 요청
diff --git a/src/main/java/com/haru/api/global/apiPayload/code/status/ErrorStatus.java b/src/main/java/com/haru/api/global/apiPayload/code/status/ErrorStatus.java
index 9e239dcf..f512f785 100644
--- a/src/main/java/com/haru/api/global/apiPayload/code/status/ErrorStatus.java
+++ b/src/main/java/com/haru/api/global/apiPayload/code/status/ErrorStatus.java
@@ -69,7 +69,8 @@ public enum ErrorStatus implements BaseErrorCode {
     INVALID_CHOICE_FOR_QUESTION(HttpStatus.BAD_REQUEST, "MOODTRACKER4011", "분위기 트래커 질문에 유효하지 않은 선택지입니다."),
 
     // 메일 관련 에러
-    MAIL_SEND_FAIL(HttpStatus.INTERNAL_SERVER_ERROR, "MAIL500", "이메일 전송에 실패했습니다."),
+    MAIL_SEND_FAIL(HttpStatus.INTERNAL_SERVER_ERROR, "MAIL500", "이메일 전송에 실패했습니다. (존재하지 않는 이메일일 수 있습니다)"),
+    MAIL_INVALID_FORMAT(HttpStatus.BAD_REQUEST, "MAIL400", "이메일 형식이 잘못되었습니다."),
 
     // SNS 이벤트 관련 에러
     SNS_EVENT_NOT_FOUND(HttpStatus.BAD_REQUEST, "SNSEVENT4001", "SNS 이벤트가 존재하지 않습니다."),
diff --git a/src/main/java/com/haru/api/infra/api/restTemplate/InstagramOauth2RestTemplate.java b/src/main/java/com/haru/api/infra/api/restTemplate/InstagramOauth2RestTemplate.java
index aa3d784b..a0d4aa93 100644
--- a/src/main/java/com/haru/api/infra/api/restTemplate/InstagramOauth2RestTemplate.java
+++ b/src/main/java/com/haru/api/infra/api/restTemplate/InstagramOauth2RestTemplate.java
@@ -1,5 +1,6 @@
 package com.haru.api.infra.api.restTemplate;
 
+import com.haru.api.domain.snsEvent.entity.enums.InstagramRedirectType;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpEntity;
@@ -21,12 +22,17 @@ public class InstagramOauth2RestTemplate {
     private String instagramClientId;
     @Value("${instagram.client.secret}")
     private String instagramClientSecret;
-    @Value("${instagram.redirect.uri}")
-    private String instagramRedirectUri;
+    @Value("${instagram.redirect.uri-onboarding}")
+    private String instagramRedirectUriOnboarding;
+    @Value("${instagram.redirect.uri-workspace}")
+    private String instagramRedirectUriWorkspace;
 
     private final RestTemplate restTemplate;
 
-    public String getShortLivedAccessTokenUrl(String code) {
+    public String getShortLivedAccessTokenUrl(
+            String code,
+            InstagramRedirectType instagramRedirectType
+    ) {
         // 1. Access Token 요청
         String tokenUrl = "https://api.instagram.com/oauth/access_token";
         RestTemplate restTemplate = new RestTemplate();
@@ -35,7 +41,13 @@ public String getShortLivedAccessTokenUrl(String code) {
         params.add("client_id", instagramClientId);          // 인스타 앱의 클라이언트 ID
         params.add("client_secret", instagramClientSecret);  // 인스타 앱의 클라이언트 시크릿
         params.add("grant_type", "authorization_code");
-        params.add("redirect_uri", instagramRedirectUri);              // 인가코드와 동일한 redirect_uri
+        // 인가코드와 동일한 redirect_uri
+        if (instagramRedirectType == InstagramRedirectType.ONBOARDING) {
+            params.add("redirect_uri", instagramRedirectUriOnboarding);
+        } else if(instagramRedirectType == InstagramRedirectType.WORKSPACE) {
+            System.out.println("Using workspace redirect URI: " + instagramRedirectUriWorkspace);
+            params.add("redirect_uri", instagramRedirectUriWorkspace);
+        }
         params.add("code", code);
 
         HttpHeaders headers = new HttpHeaders();
diff --git a/src/main/java/com/haru/api/infra/mail/SmtpEmailSender.java b/src/main/java/com/haru/api/infra/mail/SmtpEmailSender.java
index 4ebea824..7e391d16 100644
--- a/src/main/java/com/haru/api/infra/mail/SmtpEmailSender.java
+++ b/src/main/java/com/haru/api/infra/mail/SmtpEmailSender.java
@@ -3,6 +3,8 @@
 import com.haru.api.global.apiPayload.code.status.ErrorStatus;
 import com.haru.api.infra.mail.handler.MailHandler;
 import jakarta.mail.MessagingException;
+import jakarta.mail.internet.AddressException;
+import jakarta.mail.internet.InternetAddress;
 import jakarta.mail.internet.MimeMessage;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -27,6 +29,13 @@ public void send(
             String title,
             String content
     ) {
+        // 1. 이메일 형식 검증
+        if (!isValidEmail(to)) {
+            log.warn("잘못된 이메일 형식 - {}", to);
+            throw new MailHandler(ErrorStatus.MAIL_INVALID_FORMAT);
+        }
+
+        // 2. 메일 전송 시도
         try {
             MimeMessage message = javaMailSender.createMimeMessage();
             MimeMessageHelper helper = new MimeMessageHelper(message, false, "UTF-8");
@@ -44,5 +53,16 @@ public void send(
             throw new MailHandler(ErrorStatus.MAIL_SEND_FAIL);
         }
     }
+
+    // RFC 형식 검증
+    private boolean isValidEmail(String email) {
+        try {
+            InternetAddress internetAddress = new InternetAddress(email);
+            internetAddress.validate(); // 형식이 틀리면 AddressException 발생
+            return true;
+        } catch (AddressException e) {
+            return false;
+        }
+    }
 }
 
diff --git a/src/main/java/com/haru/api/infra/redis/RedisReportConsumer.java b/src/main/java/com/haru/api/infra/redis/RedisReportConsumer.java
index cb149aa1..30a5a61d 100644
--- a/src/main/java/com/haru/api/infra/redis/RedisReportConsumer.java
+++ b/src/main/java/com/haru/api/infra/redis/RedisReportConsumer.java
@@ -44,4 +44,18 @@ public void pollQueueEvery30Minutes() {
             }
         }
     }
+
+    @Transactional
+    public void removeFromQueue(Long moodTrackerId) {
+        try {
+            Long removed = redisTemplate.opsForZSet().remove(QUEUE_KEY, moodTrackerId.toString());
+            if (removed != null && removed > 0) {
+                log.info("즉시 생성 API 호출로 큐에서 제거됨: {}", moodTrackerId);
+            } else {
+                log.info("큐에 존재하지 않아 제거할 항목 없음: {}", moodTrackerId);
+            }
+        } catch (Exception e) {
+            log.error("큐 제거 실패: {}", moodTrackerId, e);
+        }
+    }
 }
diff --git a/src/main/java/com/haru/api/infra/s3/AmazonS3Manager.java b/src/main/java/com/haru/api/infra/s3/AmazonS3Manager.java
index ae161a07..0f4fe1b8 100644
--- a/src/main/java/com/haru/api/infra/s3/AmazonS3Manager.java
+++ b/src/main/java/com/haru/api/infra/s3/AmazonS3Manager.java
@@ -153,6 +153,7 @@ public byte[] downloadFile(String keyName) {
         }
     }
 
+    // newDisplayName에 확장자 포함되어있음
     public void updateFileTitle(String keyName, String newDisplayName) {
 
         try {
diff --git a/src/main/java/com/haru/api/infra/s3/MarkdownFileUploader.java b/src/main/java/com/haru/api/infra/s3/MarkdownFileUploader.java
index 6c7e88d3..41900bc1 100644
--- a/src/main/java/com/haru/api/infra/s3/MarkdownFileUploader.java
+++ b/src/main/java/com/haru/api/infra/s3/MarkdownFileUploader.java
@@ -42,7 +42,7 @@ public String createOrUpdatePdf(String markdownText, String featurePath, String
         }
 
         // 3. 결정된 키로 PDF 파일을 S3에 업로드
-        amazonS3Manager.uploadFileWithTitle(pdfKeyToUse, pdfBytes, "application/pdf", fileTitle);
+        amazonS3Manager.uploadFileWithTitle(pdfKeyToUse, pdfBytes, "application/pdf", fileTitle + ".pdf");
         log.info("PDF 업로드/갱신 성공. Key: {}", pdfKeyToUse);
 
         // 4. 사용된 PDF의 key를 반환
@@ -65,7 +65,7 @@ public String createOrUpdateWord(String markdownText, String featurePath, String
 
         // 3. 결정된 키로 Word 파일을 S3에 업로드
         String contentType = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
-        amazonS3Manager.uploadFileWithTitle(wordKeyToUse, wordBytes, contentType, fileTitle);
+        amazonS3Manager.uploadFileWithTitle(wordKeyToUse, wordBytes, contentType, fileTitle + ".docx");
         log.info("Word 파일 업로드/갱신 성공. Key: {}", wordKeyToUse);
 
         // 4. 사용된 Word의 key를 반환
diff --git a/src/test/resources/application-test.yml b/src/test/resources/application-test.yml
index 5f8ed5ae..f100cf77 100644
--- a/src/test/resources/application-test.yml
+++ b/src/test/resources/application-test.yml
@@ -57,4 +57,5 @@ instagram:
     id: "dummy-client-id"
     secret: "dummy-client-secret"
   redirect:
-    uri: "dummy-redirect-uri"
\ No newline at end of file
+    uri-onboarding: "dummy-redirect-uri"
+    uri-workspace: "dummy-redirect-uri"
\ No newline at end of file