diff --git a/apps/user-service/src/main/java/site/icebang/domain/email/controller/EmailTestController.java b/apps/user-service/src/main/java/site/icebang/domain/email/controller/EmailTestController.java
new file mode 100644
index 00000000..633e3ee7
--- /dev/null
+++ b/apps/user-service/src/main/java/site/icebang/domain/email/controller/EmailTestController.java
@@ -0,0 +1,37 @@
+package site.icebang.domain.email.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.web.bind.annotation.*;
+
+import lombok.RequiredArgsConstructor;
+
+import site.icebang.domain.email.dto.EmailRequest;
+import site.icebang.domain.email.service.EmailService;
+
+@RestController
+@RequestMapping("/api/v1/email")
+@RequiredArgsConstructor
+public class EmailTestController {
+  private final EmailService emailService;
+
+  @GetMapping("/test")
+  @PreAuthorize("permitAll()")
+  public ResponseEntity<String> sendTestEmail(@RequestParam String to) {
+    try {
+      EmailRequest emailRequest =
+          EmailRequest.builder()
+              .to(to)
+              .subject("IceBang 실제 테스트 이메일")
+              .body("안녕하세요!\n\nIceBang에서 보내는 실제 Gmail 테스트 이메일입니다.\n\n성공적으로 연동되었습니다!")
+              .isHtml(false)
+              .build();
+
+      emailService.send(emailRequest);
+      return ResponseEntity.ok("실제 Gmail 테스트 이메일 전송 완료! 받은편지함을 확인하세요!");
+
+    } catch (Exception e) {
+      return ResponseEntity.badRequest().body("이메일 전송 실패: " + e.getMessage());
+    }
+  }
+}
diff --git a/apps/user-service/src/main/java/site/icebang/domain/email/service/EmailServiceImpl.java b/apps/user-service/src/main/java/site/icebang/domain/email/service/EmailServiceImpl.java
index cd8ba706..1bf7454b 100644
--- a/apps/user-service/src/main/java/site/icebang/domain/email/service/EmailServiceImpl.java
+++ b/apps/user-service/src/main/java/site/icebang/domain/email/service/EmailServiceImpl.java
@@ -1,16 +1,92 @@
-// package site.icebang.domain.email.service;
-//
-// import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
-// import org.springframework.stereotype.Service;
-//
-// import lombok.RequiredArgsConstructor;
-//
-// import site.icebang.domain.email.dto.EmailRequest;
-//
-// @Service
-// @RequiredArgsConstructor
+package site.icebang.domain.email.service;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Profile;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.stereotype.Service;
+
+import jakarta.mail.MessagingException;
+import jakarta.mail.internet.MimeMessage;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+import site.icebang.domain.email.dto.EmailRequest;
+
+@Slf4j
+@Service
+@Profile({"production"})
+@RequiredArgsConstructor
 // @ConditionalOnMissingBean(EmailService.class)
-// public class EmailServiceImpl implements EmailService {
-//  @Override
-//  public void send(EmailRequest emailRequest) {}
-// }
+public class EmailServiceImpl implements EmailService {
+
+  private final JavaMailSender mailSender;
+
+  @Value("${spring.mail.username}")
+  private String defaultSender;
+
+  @Override
+  public void send(EmailRequest request) {
+    try {
+      if (request.isHtml()) {
+        sendHtmlEmail(request);
+      } else {
+        sendSimpleEmail(request);
+      }
+    } catch (Exception e) {
+      log.error("❌ 이메일 전송 실패 - To: {}", request.getTo(), e);
+      throw new RuntimeException("이메일 전송 실패: " + e.getMessage(), e);
+    }
+  }
+
+  private void sendSimpleEmail(EmailRequest request) {
+    try {
+      SimpleMailMessage message = new SimpleMailMessage();
+      message.setTo(request.getTo());
+      message.setSubject(request.getSubject());
+      message.setText(request.getBody());
+      message.setFrom(defaultSender);
+
+      // CC 설정
+      if (request.getCc() != null && !request.getCc().isEmpty()) {
+        message.setCc(request.getCc().toArray(new String[0]));
+      }
+
+      // BCC 설정
+      if (request.getBcc() != null && !request.getBcc().isEmpty()) {
+        message.setBcc(request.getBcc().toArray(new String[0]));
+      }
+
+      mailSender.send(message);
+      log.info("✅ 실제 Gmail 전송 성공! To: {}, Subject: {}", request.getTo(), request.getSubject());
+
+    } catch (Exception e) {
+      log.error("❌ Gmail 텍스트 전송 실패", e);
+      throw e;
+    }
+  }
+
+  private void sendHtmlEmail(EmailRequest request) throws MessagingException {
+    MimeMessage message = mailSender.createMimeMessage();
+    MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");
+
+    helper.setTo(request.getTo());
+    helper.setSubject(request.getSubject());
+    helper.setText(request.getBody(), true); // HTML 모드
+    helper.setFrom(defaultSender);
+
+    // CC 설정
+    if (request.getCc() != null && !request.getCc().isEmpty()) {
+      helper.setCc(request.getCc().toArray(new String[0]));
+    }
+
+    // BCC 설정
+    if (request.getBcc() != null && !request.getBcc().isEmpty()) {
+      helper.setBcc(request.getBcc().toArray(new String[0]));
+    }
+
+    mailSender.send(message);
+    log.info("✅ 실제 Gmail HTML 전송 성공! To: {}, Subject: {}", request.getTo(), request.getSubject());
+  }
+}
diff --git a/apps/user-service/src/main/java/site/icebang/domain/email/service/MockEmailService.java b/apps/user-service/src/main/java/site/icebang/domain/email/service/MockEmailService.java
index 7530667d..ee84e8ea 100644
--- a/apps/user-service/src/main/java/site/icebang/domain/email/service/MockEmailService.java
+++ b/apps/user-service/src/main/java/site/icebang/domain/email/service/MockEmailService.java
@@ -1,5 +1,6 @@
 package site.icebang.domain.email.service;
 
+import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Service;
 
 import lombok.extern.slf4j.Slf4j;
@@ -7,7 +8,7 @@
 import site.icebang.domain.email.dto.EmailRequest;
 
 @Service
-// @Profile({"test-unit", "test-e2e", "test-integration", "local", "develop", "production"})
+@Profile({"develop", "test-e2e", "test-integration", "test-unit"})
 @Slf4j
 public class MockEmailService implements EmailService {
 
diff --git a/apps/user-service/src/main/java/site/icebang/global/config/security/SecurityConfig.java b/apps/user-service/src/main/java/site/icebang/global/config/security/SecurityConfig.java
index 8b5dd63c..3543a8dd 100644
--- a/apps/user-service/src/main/java/site/icebang/global/config/security/SecurityConfig.java
+++ b/apps/user-service/src/main/java/site/icebang/global/config/security/SecurityConfig.java
@@ -78,6 +78,8 @@ public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
                     .permitAll()
                     .requestMatchers("/v0/workflows/**")
                     .permitAll()
+                    .requestMatchers("/api/v1/email/**") // 이메일 API 경로 허용
+                    .permitAll()
                     .requestMatchers("/v0/auth/check-session")
                     .authenticated()
                     .requestMatchers(SecurityEndpoints.DATA_ADMIN.getMatchers())
diff --git a/apps/user-service/src/main/resources/application-production.yml b/apps/user-service/src/main/resources/application-production.yml
index 032954ad..c3645e13 100644
--- a/apps/user-service/src/main/resources/application-production.yml
+++ b/apps/user-service/src/main/resources/application-production.yml
@@ -17,6 +17,22 @@ spring:
     minimum-idle: 5
     pool-name: HikariCP-MyBatis
 
+    # Gmail 연동 설정
+    mail:
+      host: smtp.gmail.com
+      port: 587
+      username: ${MAIL_USERNAME}
+      password: ${MAIL_PASSWORD}
+      properties:
+        mail:
+          smtp:
+            auth: true
+            starttls:
+              enable: true
+            connectiontimeout: 5000
+            timeout: 5000
+            writetimeout: 5000
+          debug: true
 #  quartz:
 #    jdbc:
 #      initialize-schema: never