diff --git a/pkg/bridge/bridge.go b/pkg/bridge/bridge.go
index fe0e84a..b4d32de 100644
--- a/pkg/bridge/bridge.go
+++ b/pkg/bridge/bridge.go
@@ -132,13 +132,15 @@ func (b *Bridge) Run() error {
 
 	imapBackend := imap.NewIMAPBackend(b.listener, b.settings, b.Users)
 	smtpBackend := smtp.NewSMTPBackend(b.listener, b.Users)
+	serverAddress := b.settings.Get(settings.ServerAddress)
 
 	go func() {
 		imapPort := b.settings.GetInt(settings.IMAPPortKey)
 		imap.NewIMAPServer(
 			false, // log client
 			false, // log server
-			imapPort, tlsConfig, imapBackend, b.listener).ListenAndServe()
+			serverAddress, imapPort, tlsConfig,
+			imapBackend, b.listener).ListenAndServe()
 	}()
 
 	go func() {
@@ -146,7 +148,8 @@ func (b *Bridge) Run() error {
 		useSSL := false
 		smtp.NewSMTPServer(
 			false,
-			smtpPort, useSSL, tlsConfig, smtpBackend, b.listener).ListenAndServe()
+			serverAddress, smtpPort, useSSL, tlsConfig,
+			smtpBackend, b.listener).ListenAndServe()
 	}()
 
 	done := make(chan os.Signal, 1)
diff --git a/pkg/config/settings/settings.go b/pkg/config/settings/settings.go
index 38c5ad8..8575b17 100644
--- a/pkg/config/settings/settings.go
+++ b/pkg/config/settings/settings.go
@@ -41,6 +41,7 @@ const (
 	X509Key               = "X509Key"
 	X509Cert              = "X509Cert"
 	CookieJar             = "CookieJar"
+	ServerAddress         = "ServerAddress"
 )
 
 type Settings struct {
@@ -85,4 +86,5 @@ func (s *Settings) setDefaultValues() {
 	s.setDefault(X509Key, filepath.Join(s.settingsDir, "key.pem"))
 	s.setDefault(X509Cert, filepath.Join(s.settingsDir, "cert.pem"))
 	s.setDefault(CookieJar, filepath.Join(s.settingsDir, "cookies.json"))
+	s.setDefault(ServerAddress, "127.0.0.1")
 }
diff --git a/pkg/imap/server.go b/pkg/imap/server.go
index c87d821..cbdb920 100644
--- a/pkg/imap/server.go
+++ b/pkg/imap/server.go
@@ -43,6 +43,7 @@ import (
 type Server struct {
 	debugClient bool
 	debugServer bool
+	address     string
 	port        int
 
 	server     *imapserver.Server
@@ -52,6 +53,7 @@ type Server struct {
 // NewIMAPServer constructs a new IMAP server configured with the given options.
 func NewIMAPServer(
 	debugClient, debugServer bool,
+	address string,
 	port int,
 	tls *tls.Config,
 	imapBackend backend.Backend,
@@ -60,6 +62,7 @@ func NewIMAPServer(
 	server := &Server{
 		debugClient: debugClient,
 		debugServer: debugServer,
+		address:     address,
 		port:        port,
 	}
 
@@ -112,7 +115,7 @@ func (s *Server) Close() { s.controller.Close() }
 
 func (Server) Protocol() serverutil.Protocol { return serverutil.IMAP }
 func (s *Server) UseSSL() bool               { return false }
-func (s *Server) Address() string            { return fmt.Sprintf("%s:%d", "127.0.0.1", s.port) }
+func (s *Server) Address() string            { return fmt.Sprintf("%s:%d", s.address, s.port) }
 func (s *Server) TLSConfig() *tls.Config     { return s.server.TLSConfig }
 
 func (s *Server) DebugServer() bool { return s.debugServer }
diff --git a/pkg/smtp/server.go b/pkg/smtp/server.go
index 0c03da4..b43d896 100644
--- a/pkg/smtp/server.go
+++ b/pkg/smtp/server.go
@@ -34,6 +34,7 @@ type Server struct {
 	backend goSMTP.Backend
 	debug   bool
 	useSSL  bool
+	address string
 	port    int
 	tls     *tls.Config
 
@@ -43,7 +44,10 @@ type Server struct {
 
 // NewSMTPServer returns an SMTP server configured with the given options.
 func NewSMTPServer(
-	debug bool, port int, useSSL bool,
+	debug bool,
+	address string,
+	port int,
+	useSSL bool,
 	tls *tls.Config,
 	smtpBackend goSMTP.Backend,
 	eventListener listener.Listener,
@@ -52,6 +56,7 @@ func NewSMTPServer(
 		backend: smtpBackend,
 		debug:   debug,
 		useSSL:  useSSL,
+		address: address,
 		port:    port,
 		tls:     tls,
 	}
@@ -94,7 +99,7 @@ func (s *Server) Close() { s.controller.Close() }
 
 func (Server) Protocol() serverutil.Protocol { return serverutil.SMTP }
 func (s *Server) UseSSL() bool               { return s.useSSL }
-func (s *Server) Address() string            { return fmt.Sprintf("%s:%d", "127.0.0.1", s.port) }
+func (s *Server) Address() string            { return fmt.Sprintf("%s:%d", s.address, s.port) }
 func (s *Server) TLSConfig() *tls.Config     { return s.tls }
 
 func (s *Server) DebugServer() bool { return s.debug }