diff --git a/backend/config/config.go b/backend/config/config.go
index 7bb4079..afc2dda 100644
--- a/backend/config/config.go
+++ b/backend/config/config.go
@@ -155,7 +155,7 @@ func (l *logFormatter) Format(entry *log.Entry) ([]byte, error) {
 		}
 	}
 	if entry.Caller != nil {
-		b.WriteString(fmt.Sprintf("[%s:%d]", entry.Caller.File, entry.Caller.Line))
+		b.WriteString(fmt.Sprintf("[%s:%d]", runtimepath.CleanCallerPath(entry.Caller.File), entry.Caller.Line))
 	}
 	b.WriteString(entry.Message)
 	// 错误字段也是有效内容，不能在消息为空时被格式器丢弃。
diff --git a/backend/config/manager_v2.go b/backend/config/manager_v2.go
index e669049..28ee8bd 100644
--- a/backend/config/manager_v2.go
+++ b/backend/config/manager_v2.go
@@ -883,6 +883,13 @@ func applySectionPayload(current RuntimeConfig, section Section, payload json.Ra
 			return RuntimeConfig{}, ErrInvalidSecretChange
 		}
 		value.SMTPSectionConfig.Relay.Password = current.SMTP.Relay.Password
+		if smtpRelayConfigured(value.SMTPSectionConfig.Relay) && value.SMTPSectionConfig.Relay.Security == "" {
+			if ResolveMailSecurity(value.SMTPSectionConfig.Listener) == MailSecurityImplicitTLS {
+				value.SMTPSectionConfig.Relay.Security = MailSecurityImplicitTLS
+			} else {
+				value.SMTPSectionConfig.Relay.Security = MailSecuritySTARTTLS
+			}
+		}
 		candidate.SMTP = value.SMTPSectionConfig
 		candidate.Email.Policy.LoginVerificationPolicy = candidate.SMTP.Relay.LoginPolicy
 	case SectionEmail:
@@ -904,6 +911,13 @@ func applySectionPayload(current RuntimeConfig, section Section, payload json.Ra
 			return RuntimeConfig{}, ErrInvalidSecretChange
 		}
 		value.MailSectionConfig.Relay.Password = current.SMTP.Relay.Password
+		if smtpRelayConfigured(value.Relay) && value.Relay.Security == "" {
+			if ResolveMailSecurity(value.Listener) == MailSecurityImplicitTLS {
+				value.Relay.Security = MailSecurityImplicitTLS
+			} else {
+				value.Relay.Security = MailSecuritySTARTTLS
+			}
+		}
 		candidate.SMTP = SMTPSectionConfig{
 			Meta:     value.Meta,
 			Listener: value.Listener,
diff --git a/backend/hooks/framework/framework.go b/backend/hooks/framework/framework.go
index 156eac2..99ae370 100644
--- a/backend/hooks/framework/framework.go
+++ b/backend/hooks/framework/framework.go
@@ -1,6 +1,7 @@
 package framework
 
 import (
+	"git.pcux.cn/xuans/Smail/utils/runtimepath"
 	"bytes"
 	"crypto/subtle"
 	"encoding/json"
@@ -141,7 +142,7 @@ func (l *logFormatter) Format(entry *log.Entry) ([]byte, error) {
 			b.WriteString(fmt.Sprintf("[%s]", ctx.GetValue(context.LogID)))
 		}
 	}
-	b.WriteString(fmt.Sprintf("[%s:%d]", entry.Caller.File, entry.Caller.Line))
+	b.WriteString(fmt.Sprintf("[%s:%d]", runtimepath.CleanCallerPath(entry.Caller.File), entry.Caller.Line))
 	b.WriteString(entry.Message)
 
 	b.WriteString("\n")
diff --git a/backend/utils/runtimepath/layout.go b/backend/utils/runtimepath/layout.go
index fb4123e..fee9125 100644
--- a/backend/utils/runtimepath/layout.go
+++ b/backend/utils/runtimepath/layout.go
@@ -270,3 +270,26 @@ func migrate(root string, rename func(string, string) error) ([]Move, error) {
 	}
 	return completed, nil
 }
+
+// CleanCallerPath 清洗调用者代码路径，去除本地盘符和宿主机绝对目录，只保留模块相对路径。
+func CleanCallerPath(path string) string {
+	if strings.TrimSpace(path) == "" {
+		return ""
+	}
+	normalized := strings.ReplaceAll(path, string(filepath.Separator), "/")
+	normalized = strings.ReplaceAll(normalized, "\\", "/")
+	for _, target := range []string{"backend/", "frontend/", "plugins/"} {
+		if index := strings.Index(normalized, target); index != -1 {
+			return normalized[index:]
+		}
+	}
+	marker := "smail/"
+	lower := strings.ToLower(normalized)
+	if index := strings.Index(lower, marker); index != -1 {
+		return normalized[index+len(marker):]
+	}
+	if len(normalized) >= 2 && normalized[1] == ':' {
+		return strings.TrimLeft(normalized[2:], "/")
+	}
+	return normalized
+}
diff --git a/frontend/src/views/components/ConfigSettings/ConfigForm/ConfigForm.js b/frontend/src/views/components/ConfigSettings/ConfigForm/ConfigForm.js
index e296ba1..082ddc6 100644
--- a/frontend/src/views/components/ConfigSettings/ConfigForm/ConfigForm.js
+++ b/frontend/src/views/components/ConfigSettings/ConfigForm/ConfigForm.js
@@ -11,10 +11,10 @@ const mailSecurity = config => {
   const value = normalizedMailSecurity(config.listener?.security)
   return value || 'both'
 }
-const relaySecurityForMail = config => mailSecurity(config) === 'implicit_tls' ? 'implicit_tls' : 'starttls'
+export const relaySecurityForMail = config => mailSecurity(config) === 'implicit_tls' ? 'implicit_tls' : 'starttls'
 const startTLSMail = config => mailSecurity(config) === 'starttls'
 const implicitTLSMail = config => mailSecurity(config) === 'implicit_tls'
-const relayConfigured = config => !!(
+export const relayConfigured = config => !!(
   config.relay?.relayHost || config.relay?.username || config.relay?.password ||
   config.relay?.from
 )
diff --git a/frontend/src/views/components/ConfigSettings/ConfigSettings.js b/frontend/src/views/components/ConfigSettings/ConfigSettings.js
index c451de2..9b2bc24 100644
--- a/frontend/src/views/components/ConfigSettings/ConfigSettings.js
+++ b/frontend/src/views/components/ConfigSettings/ConfigSettings.js
@@ -3,7 +3,7 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import { http } from '@/utils/axios'
 import { useGlobalStatusStore } from '@/stores/useGlobalStatusStore'
 import { isRecentAuthenticationCancelled, requestWithRecentAuthentication } from '@/utils/recentAuthentication'
-import { readFormConfig, updateFormConfig, validateFormConfig } from './ConfigForm/ConfigForm.js'
+import { readFormConfig, updateFormConfig, validateFormConfig, relayConfigured, relaySecurityForMail } from './ConfigForm/ConfigForm.js'
 
 const sections = [
   { value: 'base', label: '基础配置' },
@@ -493,6 +493,9 @@ export function usePage(pageKey = 'base') {
             delete payload.relay
           }
         }
+        if (payload.relay && relayConfigured(payload) && !payload.relay.security) {
+          payload.relay.security = relaySecurityForMail(payload)
+        }
       }
       if (apiSection() === 'plugins' && payload.plugins && typeof payload.plugins === 'object') {
         Object.values(payload.plugins).forEach(plugin => {