diff --git a/config/smtpconf.go b/config/smtpconf.go
index 9b5f618914..38cec70d1a 100644
--- a/config/smtpconf.go
+++ b/config/smtpconf.go
@@ -7,15 +7,16 @@ import (
 
 // SMTPConf is smtp config
 type SMTPConf struct {
-	SMTPAddr      string   `toml:"smtpAddr,omitempty" json:"-"`
-	SMTPPort      string   `toml:"smtpPort,omitempty" valid:"port" json:"-"`
-	User          string   `toml:"user,omitempty" json:"-"`
-	Password      string   `toml:"password,omitempty" json:"-"`
-	From          string   `toml:"from,omitempty" json:"-"`
-	To            []string `toml:"to,omitempty" json:"-"`
-	Cc            []string `toml:"cc,omitempty" json:"-"`
-	SubjectPrefix string   `toml:"subjectPrefix,omitempty" json:"-"`
-	Enabled       bool     `toml:"-" json:"-"`
+	SMTPAddr              string   `toml:"smtpAddr,omitempty" json:"-"`
+	SMTPPort              string   `toml:"smtpPort,omitempty" valid:"port" json:"-"`
+	TLSInsecureSkipVerify bool     `toml:"tlsInsecureSkipVerify,omitempty" json:"-"`
+	User                  string   `toml:"user,omitempty" json:"-"`
+	Password              string   `toml:"password,omitempty" json:"-"`
+	From                  string   `toml:"from,omitempty" json:"-"`
+	To                    []string `toml:"to,omitempty" json:"-"`
+	Cc                    []string `toml:"cc,omitempty" json:"-"`
+	SubjectPrefix         string   `toml:"subjectPrefix,omitempty" json:"-"`
+	Enabled               bool     `toml:"-" json:"-"`
 }
 
 func checkEmails(emails []string) (errs []error) {
diff --git a/reporter/email.go b/reporter/email.go
index 4f9f4fdc21..9d913ceaf4 100644
--- a/reporter/email.go
+++ b/reporter/email.go
@@ -94,7 +94,8 @@ func (e *emailSender) sendMail(smtpServerAddr, message string) (err error) {
 	emailConf := e.conf
 	//TLS Config
 	tlsConfig := &tls.Config{
-		ServerName: emailConf.SMTPAddr,
+		ServerName:         emailConf.SMTPAddr,
+		InsecureSkipVerify: emailConf.TLSInsecureSkipVerify,
 	}
 	switch emailConf.SMTPPort {
 	case "465":
@@ -178,19 +179,7 @@ func (e *emailSender) Send(subject, body string) (err error) {
 	for k, v := range headers {
 		header += fmt.Sprintf("%s: %s\r\n", k, v)
 	}
-	message := fmt.Sprintf("%s\r\n%s", header, body)
-
-	smtpServer := net.JoinHostPort(emailConf.SMTPAddr, emailConf.SMTPPort)
-
-	if emailConf.User != "" && emailConf.Password != "" {
-		err = e.sendMail(smtpServer, message)
-		if err != nil {
-			return xerrors.Errorf("Failed to send emails: %w", err)
-		}
-		return nil
-	}
-	err = e.sendMail(smtpServer, message)
-	if err != nil {
+	if err := e.sendMail(net.JoinHostPort(emailConf.SMTPAddr, emailConf.SMTPPort), fmt.Sprintf("%s\r\n%s", header, body)); err != nil {
 		return xerrors.Errorf("Failed to send emails: %w", err)
 	}
 	return nil
diff --git a/subcmds/discover.go b/subcmds/discover.go
index 5bec414a3c..af7a9650b5 100644
--- a/subcmds/discover.go
+++ b/subcmds/discover.go
@@ -125,14 +125,15 @@ func printConfigToml(ips []string) (err error) {
 
 # https://vuls.io/docs/en/config.toml.html#email-section
 #[email]
-#smtpAddr      = "smtp.example.com"
-#smtpPort      = "587"
-#user          = "username"
-#password      = "password"
-#from          = "from@example.com"
-#to            = ["to@example.com"]
-#cc            = ["cc@example.com"]
-#subjectPrefix = "[vuls]"
+#smtpAddr              = "smtp.example.com"
+#smtpPort              = "587"
+#tlsInsecureSkipVerify = false
+#user                  = "username"
+#password              = "password"
+#from                  = "from@example.com"
+#to                    = ["to@example.com"]
+#cc                    = ["cc@example.com"]
+#subjectPrefix         = "[vuls]"
 
 # https://vuls.io/docs/en/config.toml.html#http-section
 #[http]