diff --git a/cmd/channels/email/main.go b/cmd/channels/email/main.go
index f1339a08..a42a90eb 100644
--- a/cmd/channels/email/main.go
+++ b/cmd/channels/email/main.go
@@ -16,6 +16,10 @@ import (
 	"net/mail"
 )
 
+func main() {
+	plugin.RunPlugin(&Email{})
+}
+
 const (
 	EncryptionNone     = "none"
 	EncryptionStartTLS = "starttls"
@@ -32,86 +36,6 @@ type Email struct {
 	Encryption string `json:"encryption"`
 }
 
-func main() {
-	plugin.RunPlugin(&Email{})
-}
-
-func (ch *Email) SendNotification(req *plugin.NotificationRequest) error {
-	var to []mail.Address
-	for _, address := range req.Contact.Addresses {
-		if address.Type == "email" {
-			to = append(to, mail.Address{Name: req.Contact.FullName, Address: address.Address})
-		}
-	}
-
-	if len(to) == 0 {
-		return fmt.Errorf("contact user %s does not have an e-mail address", req.Contact.FullName)
-	}
-
-	var msg bytes.Buffer
-	plugin.FormatMessage(&msg, req)
-
-	return enmime.Builder().
-		ToAddrs(to).
-		From(ch.SenderName, ch.SenderMail).
-		Subject(plugin.FormatSubject(req)).
-		Header("Message-Id", fmt.Sprintf("<%s-%s>", uuid.New().String(), ch.SenderMail)).
-		Text(msg.Bytes()).
-		Send(ch)
-}
-
-func (ch *Email) Send(reversePath string, recipients []string, msg []byte) error {
-	var (
-		client *smtp.Client
-		err    error
-	)
-
-	switch ch.Encryption {
-	case EncryptionStartTLS:
-		client, err = smtp.DialStartTLS(ch.GetServer(), nil)
-	case EncryptionTLS:
-		client, err = smtp.DialTLS(ch.GetServer(), nil)
-	case EncryptionNone:
-		client, err = smtp.Dial(ch.GetServer())
-	default:
-		return fmt.Errorf("unsupported mail encryption type %q", ch.Encryption)
-	}
-	if err != nil {
-		return err
-	}
-	defer func() { _ = client.Close() }()
-
-	if ch.Password != "" {
-		if err = client.Auth(sasl.NewPlainClient("", ch.User, ch.Password)); err != nil {
-			return err
-		}
-	}
-
-	if err := client.SendMail(reversePath, recipients, bytes.NewReader(msg)); err != nil {
-		return err
-	}
-
-	return client.Quit()
-}
-
-func (ch *Email) SetConfig(jsonStr json.RawMessage) error {
-	err := plugin.PopulateDefaults(ch)
-	if err != nil {
-		return err
-	}
-
-	err = json.Unmarshal(jsonStr, ch)
-	if err != nil {
-		return fmt.Errorf("failed to load config: %s %w", jsonStr, err)
-	}
-
-	if (ch.User == "") != (ch.Password == "") {
-		return fmt.Errorf("user and password fields must both be set or empty")
-	}
-
-	return nil
-}
-
 func (ch *Email) GetInfo() *plugin.Info {
 	configAttrs := plugin.ConfigOptions{
 		{
@@ -197,6 +121,81 @@ func (ch *Email) GetInfo() *plugin.Info {
 	}
 }
 
-func (ch *Email) GetServer() string {
-	return net.JoinHostPort(ch.Host, ch.Port)
+func (ch *Email) SetConfig(jsonStr json.RawMessage) error {
+	err := plugin.PopulateDefaults(ch)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(jsonStr, ch)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %s %w", jsonStr, err)
+	}
+
+	if (ch.User == "") != (ch.Password == "") {
+		return fmt.Errorf("user and password fields must both be set or empty")
+	}
+
+	return nil
+}
+
+func (ch *Email) SendNotification(req *plugin.NotificationRequest) error {
+	var to []mail.Address
+	for _, address := range req.Contact.Addresses {
+		if address.Type == "email" {
+			to = append(to, mail.Address{Name: req.Contact.FullName, Address: address.Address})
+		}
+	}
+
+	if len(to) == 0 {
+		return fmt.Errorf("contact user %s does not have an e-mail address", req.Contact.FullName)
+	}
+
+	var msg bytes.Buffer
+	plugin.FormatMessage(&msg, req)
+
+	return enmime.Builder().
+		ToAddrs(to).
+		From(ch.SenderName, ch.SenderMail).
+		Subject(plugin.FormatSubject(req)).
+		Header("Message-Id", fmt.Sprintf("<%s-%s>", uuid.New().String(), ch.SenderMail)).
+		Text(msg.Bytes()).
+		Send(ch)
+}
+
+// Send implements the enmime.Sender interface.
+func (ch *Email) Send(reversePath string, recipients []string, msg []byte) error {
+	var (
+		client *smtp.Client
+		err    error
+	)
+
+	serverAddr := net.JoinHostPort(ch.Host, ch.Port)
+
+	switch ch.Encryption {
+	case EncryptionStartTLS:
+		client, err = smtp.DialStartTLS(serverAddr, nil)
+	case EncryptionTLS:
+		client, err = smtp.DialTLS(serverAddr, nil)
+	case EncryptionNone:
+		client, err = smtp.Dial(serverAddr)
+	default:
+		return fmt.Errorf("unsupported mail encryption type %q", ch.Encryption)
+	}
+	if err != nil {
+		return err
+	}
+	defer func() { _ = client.Close() }()
+
+	if ch.Password != "" {
+		if err = client.Auth(sasl.NewPlainClient("", ch.User, ch.Password)); err != nil {
+			return err
+		}
+	}
+
+	if err := client.SendMail(reversePath, recipients, bytes.NewReader(msg)); err != nil {
+		return err
+	}
+
+	return client.Quit()
 }
diff --git a/cmd/channels/rocketchat/main.go b/cmd/channels/rocketchat/main.go
index 49afb0b2..199d9d72 100644
--- a/cmd/channels/rocketchat/main.go
+++ b/cmd/channels/rocketchat/main.go
@@ -11,14 +11,62 @@ import (
 	"time"
 )
 
+func main() {
+	plugin.RunPlugin(&RocketChat{})
+}
+
 type RocketChat struct {
 	URL    string `json:"url"`
 	UserID string `json:"user_id"`
 	Token  string `json:"token"`
 }
 
-func main() {
-	plugin.RunPlugin(&RocketChat{})
+func (ch *RocketChat) GetInfo() *plugin.Info {
+	configAttrs := plugin.ConfigOptions{
+		{
+			Name: "url",
+			Type: "string",
+			Label: map[string]string{
+				"en_US": "Rocket.Chat URL",
+				"de_DE": "Rocket.Chat URL",
+			},
+			Required: true,
+		},
+		{
+			Name: "user_id",
+			Type: "string",
+			Label: map[string]string{
+				"en_US": "User ID",
+				"de_DE": "Benutzer ID",
+			},
+			Required: true,
+		},
+		{
+			Name: "token",
+			Type: "secret",
+			Label: map[string]string{
+				"en_US": "Personal Access Token",
+				"de_DE": "Persönliches Zugangstoken",
+			},
+			Required: true,
+		},
+	}
+
+	return &plugin.Info{
+		Name:             "Rocket.Chat",
+		Version:          internal.Version.Version,
+		Author:           "Icinga GmbH",
+		ConfigAttributes: configAttrs,
+	}
+}
+
+func (ch *RocketChat) SetConfig(jsonStr json.RawMessage) error {
+	err := plugin.PopulateDefaults(ch)
+	if err != nil {
+		return err
+	}
+
+	return json.Unmarshal(jsonStr, ch)
 }
 
 func (ch *RocketChat) SendNotification(req *plugin.NotificationRequest) error {
@@ -75,51 +123,3 @@ func (ch *RocketChat) SendNotification(req *plugin.NotificationRequest) error {
 
 	return nil
 }
-
-func (ch *RocketChat) SetConfig(jsonStr json.RawMessage) error {
-	err := plugin.PopulateDefaults(ch)
-	if err != nil {
-		return err
-	}
-
-	return json.Unmarshal(jsonStr, ch)
-}
-
-func (ch *RocketChat) GetInfo() *plugin.Info {
-	configAttrs := plugin.ConfigOptions{
-		{
-			Name: "url",
-			Type: "string",
-			Label: map[string]string{
-				"en_US": "Rocket.Chat URL",
-				"de_DE": "Rocket.Chat URL",
-			},
-			Required: true,
-		},
-		{
-			Name: "user_id",
-			Type: "string",
-			Label: map[string]string{
-				"en_US": "User ID",
-				"de_DE": "Benutzer ID",
-			},
-			Required: true,
-		},
-		{
-			Name: "token",
-			Type: "secret",
-			Label: map[string]string{
-				"en_US": "Personal Access Token",
-				"de_DE": "Persönliches Zugangstoken",
-			},
-			Required: true,
-		},
-	}
-
-	return &plugin.Info{
-		Name:             "Rocket.Chat",
-		Version:          internal.Version.Version,
-		Author:           "Icinga GmbH",
-		ConfigAttributes: configAttrs,
-	}
-}
diff --git a/cmd/channels/webhook/main.go b/cmd/channels/webhook/main.go
index 5407b12f..90a72701 100644
--- a/cmd/channels/webhook/main.go
+++ b/cmd/channels/webhook/main.go
@@ -14,6 +14,10 @@ import (
 	"text/template"
 )
 
+func main() {
+	plugin.RunPlugin(&Webhook{})
+}
+
 type Webhook struct {
 	Method              string `json:"method"`
 	URLTemplate         string `json:"url_template"`
@@ -164,7 +168,3 @@ func (ch *Webhook) SendNotification(req *plugin.NotificationRequest) error {
 
 	return nil
 }
-
-func main() {
-	plugin.RunPlugin(&Webhook{})
-}