From a0980d017b1257018446228162a8d17bff17798f Mon Sep 17 00:00:00 2001
From: Alexis Mousset <contact@amousset.me>
Date: Mon, 1 Feb 2021 11:11:25 +0100
Subject: [PATCH] Make EmailFormat trait private (#535)

It does not need to be exposed.
---
 src/address/mod.rs              | 2 ++
 src/error.rs                    | 2 ++
 src/message/mod.rs              | 3 ++-
 src/transport/smtp/transport.rs | 1 +
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/address/mod.rs b/src/address/mod.rs
index c53a75a..765914d 100644
--- a/src/address/mod.rs
+++ b/src/address/mod.rs
@@ -1,3 +1,5 @@
+//! Email addresses
+
 #[cfg(feature = "serde")]
 mod serde;
 
diff --git a/src/error.rs b/src/error.rs
index 1e456a9..668c31c 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,5 @@
+//! Error type for email messages
+
 use std::{
     error::Error as StdError,
     fmt::{self, Display, Formatter},
diff --git a/src/message/mod.rs b/src/message/mod.rs
index 52e8e53..8718541 100644
--- a/src/message/mod.rs
+++ b/src/message/mod.rs
@@ -265,7 +265,8 @@ use crate::{
 
 const DEFAULT_MESSAGE_ID_DOMAIN: &str = "localhost";
 
-pub trait EmailFormat {
+/// Something that can be formatted as an email message
+trait EmailFormat {
     // Use a writer?
     fn format(&self, out: &mut Vec<u8>);
 }
diff --git a/src/transport/smtp/transport.rs b/src/transport/smtp/transport.rs
index d548e0c..912c330 100644
--- a/src/transport/smtp/transport.rs
+++ b/src/transport/smtp/transport.rs
@@ -13,6 +13,7 @@ use crate::Transport;
 
 #[allow(missing_debug_implementations)]
 #[derive(Clone)]
+/// Transport using the SMTP protocol
 pub struct SmtpTransport {
     #[cfg(feature = "r2d2")]
     inner: Pool<SmtpClient>,