diff --git a/src/transport/smtp/client/mod.rs b/src/transport/smtp/client/mod.rs
index 8016c28..e245cf2 100644
--- a/src/transport/smtp/client/mod.rs
+++ b/src/transport/smtp/client/mod.rs
@@ -34,12 +34,12 @@ pub use self::async_net::AsyncNetworkStream;
 pub use self::async_net::AsyncTokioStream;
 use self::net::NetworkStream;
 #[cfg(any(feature = "native-tls", feature = "rustls", feature = "boring-tls"))]
-pub(super) use self::tls::InnerTlsParameters;
+pub(super) use self::tls::deprecated::InnerTlsParameters;
 #[cfg(any(feature = "native-tls", feature = "rustls", feature = "boring-tls"))]
-pub use self::tls::TlsVersion;
+pub use self::tls::deprecated::TlsVersion;
 pub use self::{
     connection::SmtpConnection,
-    tls::{Certificate, Identity, Tls, TlsParameters, TlsParametersBuilder},
+    tls::deprecated::{Certificate, Identity, Tls, TlsParameters, TlsParametersBuilder},
 };
 
 #[cfg(any(feature = "tokio1", feature = "async-std1"))]
diff --git a/src/transport/smtp/client/tls/boring_tls.rs b/src/transport/smtp/client/tls/boring_tls.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/transport/smtp/client/tls/boring_tls.rs
@@ -0,0 +1 @@
+
diff --git a/src/transport/smtp/client/tls.rs b/src/transport/smtp/client/tls/deprecated.rs
similarity index 100%
rename from src/transport/smtp/client/tls.rs
rename to src/transport/smtp/client/tls/deprecated.rs
diff --git a/src/transport/smtp/client/tls/mod.rs b/src/transport/smtp/client/tls/mod.rs
new file mode 100644
index 0000000..a520474
--- /dev/null
+++ b/src/transport/smtp/client/tls/mod.rs
@@ -0,0 +1,7 @@
+#[cfg(feature = "boring-tls")]
+mod boring_tls;
+pub(super) mod deprecated;
+#[cfg(feature = "native-tls")]
+mod native_tls;
+#[cfg(feature = "rustls")]
+mod rustls;
diff --git a/src/transport/smtp/client/tls/native_tls.rs b/src/transport/smtp/client/tls/native_tls.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/transport/smtp/client/tls/native_tls.rs
@@ -0,0 +1 @@
+
diff --git a/src/transport/smtp/client/tls/rustls.rs b/src/transport/smtp/client/tls/rustls.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/transport/smtp/client/tls/rustls.rs
@@ -0,0 +1 @@
+