diff --git a/build.gradle b/build.gradle
index f3f8eaf..86b1e12 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,6 +12,11 @@ repositories {
 	mavenCentral()
 }
 
+jar {
+	enabled = false
+}
+
+
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
diff --git a/src/main/java/kr/or/cola/backend/post/post/domain/PostRepository.java b/src/main/java/kr/or/cola/backend/post/post/domain/PostRepository.java
index a881b84..c66cd6e 100644
--- a/src/main/java/kr/or/cola/backend/post/post/domain/PostRepository.java
+++ b/src/main/java/kr/or/cola/backend/post/post/domain/PostRepository.java
@@ -6,7 +6,7 @@
 
 public interface PostRepository extends JpaRepository<Post, Long> {
 
-    Page<Post> findByPostType(PostType postType, Pageable pageable);
+    Page<Post> findAllByPostType(PostType postType, Pageable pageable);
 
     Page<Post> findByUserId(Long userId, Pageable pageable);
 
diff --git a/src/main/java/kr/or/cola/backend/post/post/presentation/PostController.java b/src/main/java/kr/or/cola/backend/post/post/presentation/PostController.java
index 7a55b4f..10fdc3c 100644
--- a/src/main/java/kr/or/cola/backend/post/post/presentation/PostController.java
+++ b/src/main/java/kr/or/cola/backend/post/post/presentation/PostController.java
@@ -15,6 +15,7 @@
 import org.springframework.data.domain.Sort;
 import org.springframework.data.web.PageableDefault;
 import org.springframework.http.ResponseEntity;
+import org.springframework.lang.Nullable;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
@@ -52,7 +53,7 @@ public ResponseEntity<Void> updatePost(
     @GetMapping("")
     public ResponseEntity<Page<SimplePostResponseDto>> getPosts(
             @LoginUser SessionUser sessionUser,
-            @RequestParam(value = "category") PostType postType,
+            @RequestParam(value = "category") @Nullable PostType postType,
             @PageableDefault(
                 size = 12,
                 sort = "id",
@@ -83,7 +84,7 @@ public ResponseEntity<PostResponseDto> getPost(
         return ResponseEntity.ok(postResponse);
     }
 
-    @GetMapping("/{keyword}")
+    @GetMapping("/search/{keyword}")
     public ResponseEntity<Page<SimplePostResponseDto>> searchPosts(
         @LoginUser SessionUser sessionUser,
         @PathVariable String keyword,
diff --git a/src/main/java/kr/or/cola/backend/post/post/service/PostService.java b/src/main/java/kr/or/cola/backend/post/post/service/PostService.java
index 72e56bf..6ddfaa2 100644
--- a/src/main/java/kr/or/cola/backend/post/post/service/PostService.java
+++ b/src/main/java/kr/or/cola/backend/post/post/service/PostService.java
@@ -105,7 +105,9 @@ public void deletePost(Long postId) {
     public Page<SimplePostResponseDto> findAllPostByPostType(Long userId,
                                                              PostType postType,
                                                              Pageable pageable) {
-        Page<Post> posts = postRepository.findByPostType(postType, pageable);
+        Page<Post> posts = postType == null
+            ? postRepository.findAll(pageable)
+            : postRepository.findAllByPostType(postType, pageable);
         Map<Long, PostFavorInfoResponseDto> favorMap = new HashMap<>();
         posts.forEach(post -> {
             favorMap.put(
diff --git a/src/main/java/kr/or/cola/backend/util/CustomMailSender.java b/src/main/java/kr/or/cola/backend/util/CustomMailSender.java
index 38dc54e..83d5141 100644
--- a/src/main/java/kr/or/cola/backend/util/CustomMailSender.java
+++ b/src/main/java/kr/or/cola/backend/util/CustomMailSender.java
@@ -10,6 +10,7 @@
 import org.thymeleaf.context.Context;
 import org.thymeleaf.spring5.SpringTemplateEngine;
 
+import javax.mail.internet.AddressException;
 import javax.mail.internet.InternetAddress;
 import javax.mail.internet.MimeMessage;
 
@@ -28,7 +29,7 @@ public void sendAuthenticationToken(String authToken, String receiverEmail) {
         mailMessage.setTo(receiverEmail);
         mailMessage.setSubject("회원가입 이메일 인증");
         mailMessage.setText(authToken);
-
+        mailMessage.setFrom(managerEmail);
         sendEmail(mailMessage);
     }
 
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 18a2463..77103c9 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -32,6 +32,8 @@ spring.mail.properties.mail.smtp.auth=true
 spring.mail.properties.mail.smtp.connectiontimeout=5000
 spring.mail.properties.mail.smtp.timeout=5000
 spring.mail.properties.mail.smtp.writetimeout=5000
+spring.mail.properties.mail.ssl.enable=true
+spring.mail.properties.mail.ssl.trust=true
 
 spring.data.web.pageable.default-page-size=12