diff --git a/config/config.go b/config/config.go
index 801f927..c39e8e3 100644
--- a/config/config.go
+++ b/config/config.go
@@ -111,10 +111,10 @@ type sentryConfig struct {
 }
 
 type mailConfig struct {
-	Enabled   bool                 `env:"WAKAPI_MAIL_ENABLED" default:"true"`
-	Provider  string               `env:"WAKAPI_MAIL_PROVIDER" default:"smtp"`
-	MailWhale *MailwhaleMailConfig `yaml:"mailwhale"`
-	Smtp      *SMTPMailConfig      `yaml:"smtp"`
+	Enabled   bool                `env:"WAKAPI_MAIL_ENABLED" default:"true"`
+	Provider  string              `env:"WAKAPI_MAIL_PROVIDER" default:"smtp"`
+	MailWhale MailwhaleMailConfig `yaml:"mailwhale"`
+	Smtp      SMTPMailConfig      `yaml:"smtp"`
 }
 
 type MailwhaleMailConfig struct {
diff --git a/services/mail/mailwhale.go b/services/mail/mailwhale.go
index d7cc164..62710d0 100644
--- a/services/mail/mailwhale.go
+++ b/services/mail/mailwhale.go
@@ -13,7 +13,7 @@ import (
 
 type MailWhaleMailService struct {
 	publicUrl  string
-	config     *conf.MailwhaleMailConfig
+	config     conf.MailwhaleMailConfig
 	httpClient *http.Client
 }
 
@@ -26,7 +26,7 @@ type MailWhaleSendRequest struct {
 	TemplateVars map[string]string `json:"template_vars"`
 }
 
-func NewMailWhaleService(config *conf.MailwhaleMailConfig, publicUrl string) *MailWhaleMailService {
+func NewMailWhaleService(config conf.MailwhaleMailConfig, publicUrl string) *MailWhaleMailService {
 	return &MailWhaleMailService{
 		publicUrl: publicUrl,
 		config:    config,
diff --git a/services/mail/smtp.go b/services/mail/smtp.go
index d040f51..3007bd5 100644
--- a/services/mail/smtp.go
+++ b/services/mail/smtp.go
@@ -13,11 +13,11 @@ import (
 
 type SMTPMailService struct {
 	publicUrl string
-	config    *conf.SMTPMailConfig
+	config    conf.SMTPMailConfig
 	auth      sasl.Client
 }
 
-func NewSMTPMailService(config *conf.SMTPMailConfig, publicUrl string) *SMTPMailService {
+func NewSMTPMailService(config conf.SMTPMailConfig, publicUrl string) *SMTPMailService {
 	return &SMTPMailService{
 		publicUrl: publicUrl,
 		config:    config,