diff --git a/src/main/java/com/fullcar/core/response/ErrorCode.java b/src/main/java/com/fullcar/core/response/ErrorCode.java
index 5b1f0fc..0dddfdf 100644
--- a/src/main/java/com/fullcar/core/response/ErrorCode.java
+++ b/src/main/java/com/fullcar/core/response/ErrorCode.java
@@ -22,7 +22,6 @@ public enum ErrorCode {
     CANNOT_CHANGE_FORM_STATE(BAD_REQUEST, "카풀에 등록된 운전자만 신청서 수락/거절을 할 수 있습니다."),
     CANNOT_CLOSE_CARPOOL(BAD_REQUEST, "삭제 권한이 없습니다."),
     INVALID_FORM_STATE(BAD_REQUEST, "유효하지 않은 신청서 상태입니다."),
-    EXISTED_CODE_IN_MAIL(BAD_REQUEST, "이미 인증번호를 보냈습니다."),
     NOT_MATCHED_CODE(BAD_REQUEST, "인증번호가 일치하지 않습니다."),
 
     /* 401 UNAUTHORIZED */
diff --git a/src/main/java/com/fullcar/member/domain/mail/Mail.java b/src/main/java/com/fullcar/member/domain/mail/Mail.java
index 9480886..fc445b7 100644
--- a/src/main/java/com/fullcar/member/domain/mail/Mail.java
+++ b/src/main/java/com/fullcar/member/domain/mail/Mail.java
@@ -25,4 +25,8 @@ public class Mail {
     private MemberId memberId;
 
     private Integer code;
+
+    public void updateEmailCode(Integer code) {
+        this.code = code;
+    }
 }
diff --git a/src/main/java/com/fullcar/member/infra/MailClient.java b/src/main/java/com/fullcar/member/infra/MailClient.java
index 279bfc1..0f64349 100644
--- a/src/main/java/com/fullcar/member/infra/MailClient.java
+++ b/src/main/java/com/fullcar/member/infra/MailClient.java
@@ -26,6 +26,7 @@
 import java.util.Random;
 
 @Service
+//@Component
 @RequiredArgsConstructor
 public class MailClient implements MailService {
     private final BlacklistRepository blacklistRepository;
@@ -41,10 +42,13 @@ public void sendMail(Member member, EmailRequestDto emailRequestDto) {
         String emailDomain = email.substring(email.lastIndexOf("@")+1);
         blacklistRepository.findByEmailThrow(emailDomain);
 
-        if (mailRepository.findByMemberId(member.getId()) != null) {
-            throw new CustomException(ErrorCode.EXISTED_CODE_IN_MAIL);
+        Mail mail = mailRepository.findByMemberId(member.getId());
+        if (mail != null) {
+            mail.updateEmailCode(authNum);
+        }
+        else {
+            mailRepository.saveAndFlush(mailMapper.toEntity(member, authNum));
         }
-        mailRepository.saveAndFlush(mailMapper.toEntity(member, authNum));
 
         EmailMessage emailMessage = mailMapper.toMessageEntity(emailRequestDto);
         MimeMessage mimeMessage = javaMailSender.createMimeMessage();