diff --git a/lettre/src/file/mod.rs b/lettre/src/file/mod.rs
index 8dcad54..46e84b3 100644
--- a/lettre/src/file/mod.rs
+++ b/lettre/src/file/mod.rs
@@ -16,10 +16,7 @@ pub mod error;
 
 /// Writes the content and the envelope information to a file
 #[derive(Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct FileTransport {
     path: PathBuf,
 }
@@ -34,10 +31,7 @@ impl FileTransport {
 }
 
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 struct SerializableEmail {
     envelope: Envelope,
     message_id: String,
diff --git a/lettre/src/lib.rs b/lettre/src/lib.rs
index 3ca8173..da52bdf 100644
--- a/lettre/src/lib.rs
+++ b/lettre/src/lib.rs
@@ -44,10 +44,7 @@ use std::str::FromStr;
 
 /// Email address
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct EmailAddress(String);
 
 impl EmailAddress {
@@ -97,10 +94,7 @@ impl AsRef<OsStr> for EmailAddress {
 ///
 /// We only accept mailboxes, and do not support source routes (as per RFC).
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct Envelope {
     /// The envelope recipients' addresses
     ///
diff --git a/lettre/src/sendmail/mod.rs b/lettre/src/sendmail/mod.rs
index 402c146..40e74e1 100644
--- a/lettre/src/sendmail/mod.rs
+++ b/lettre/src/sendmail/mod.rs
@@ -14,10 +14,7 @@ pub mod error;
 
 /// Sends an email using the `sendmail` command
 #[derive(Debug, Default)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct SendmailTransport {
     command: String,
 }
diff --git a/lettre/src/smtp/authentication.rs b/lettre/src/smtp/authentication.rs
index cf35eb1..76f5d71 100644
--- a/lettre/src/smtp/authentication.rs
+++ b/lettre/src/smtp/authentication.rs
@@ -31,10 +31,7 @@ impl<S: Into<String>, T: Into<String>> IntoCredentials for (S, T) {
 
 /// Contains user credentials
 #[derive(PartialEq, Eq, Clone, Hash, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct Credentials {
     authentication_identity: String,
     secret: String,
@@ -52,10 +49,7 @@ impl Credentials {
 
 /// Represents authentication mechanisms
 #[derive(PartialEq, Eq, Copy, Clone, Hash, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum Mechanism {
     /// PLAIN authentication mechanism
     /// RFC 4616: https://tools.ietf.org/html/rfc4616
diff --git a/lettre/src/smtp/client/mod.rs b/lettre/src/smtp/client/mod.rs
index 2540269..046e6cd 100644
--- a/lettre/src/smtp/client/mod.rs
+++ b/lettre/src/smtp/client/mod.rs
@@ -18,10 +18,7 @@ pub mod net;
 
 /// The codec used for transparency
 #[derive(Default, Clone, Copy, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct ClientCodec {
     escape_count: u8,
 }
diff --git a/lettre/src/smtp/commands.rs b/lettre/src/smtp/commands.rs
index 46a6c8d..4ffaf6b 100644
--- a/lettre/src/smtp/commands.rs
+++ b/lettre/src/smtp/commands.rs
@@ -13,10 +13,7 @@ use std::fmt::{self, Display, Formatter};
 
 /// EHLO command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct EhloCommand {
     client_id: ClientId,
 }
@@ -36,10 +33,7 @@ impl EhloCommand {
 
 /// STARTTLS command
 #[derive(PartialEq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct StarttlsCommand;
 
 impl Display for StarttlsCommand {
@@ -50,10 +44,7 @@ impl Display for StarttlsCommand {
 
 /// MAIL command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct MailCommand {
     sender: Option<EmailAddress>,
     parameters: Vec<MailParameter>,
@@ -82,10 +73,7 @@ impl MailCommand {
 
 /// RCPT command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct RcptCommand {
     recipient: EmailAddress,
     parameters: Vec<RcptParameter>,
@@ -113,10 +101,7 @@ impl RcptCommand {
 
 /// DATA command
 #[derive(PartialEq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct DataCommand;
 
 impl Display for DataCommand {
@@ -127,10 +112,7 @@ impl Display for DataCommand {
 
 /// QUIT command
 #[derive(PartialEq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct QuitCommand;
 
 impl Display for QuitCommand {
@@ -141,10 +123,7 @@ impl Display for QuitCommand {
 
 /// NOOP command
 #[derive(PartialEq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct NoopCommand;
 
 impl Display for NoopCommand {
@@ -155,10 +134,7 @@ impl Display for NoopCommand {
 
 /// HELP command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct HelpCommand {
     argument: Option<String>,
 }
@@ -182,10 +158,7 @@ impl HelpCommand {
 
 /// VRFY command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct VrfyCommand {
     argument: String,
 }
@@ -206,10 +179,7 @@ impl VrfyCommand {
 
 /// EXPN command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct ExpnCommand {
     argument: String,
 }
@@ -229,10 +199,7 @@ impl ExpnCommand {
 
 /// RSET command
 #[derive(PartialEq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct RsetCommand;
 
 impl Display for RsetCommand {
@@ -243,10 +210,7 @@ impl Display for RsetCommand {
 
 /// AUTH command
 #[derive(PartialEq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct AuthCommand {
     mechanism: Mechanism,
     credentials: Credentials,
diff --git a/lettre/src/smtp/extension.rs b/lettre/src/smtp/extension.rs
index 2a7a132..1c11597 100644
--- a/lettre/src/smtp/extension.rs
+++ b/lettre/src/smtp/extension.rs
@@ -14,10 +14,7 @@ const DEFAULT_DOMAIN_CLIENT_ID: &str = "localhost";
 
 /// Client identifier, the parameter to `EHLO`
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum ClientId {
     /// A fully-qualified domain name
     Domain(String),
@@ -57,10 +54,7 @@ impl ClientId {
 
 /// Supported ESMTP keywords
 #[derive(PartialEq, Eq, Hash, Copy, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum Extension {
     /// 8BITMIME keyword
     ///
@@ -91,10 +85,7 @@ impl Display for Extension {
 
 /// Contains information about an SMTP server
 #[derive(Clone, Debug, Eq, PartialEq)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct ServerInfo {
     /// Server name
     ///
@@ -187,10 +178,7 @@ impl ServerInfo {
 
 /// A `MAIL FROM` extension parameter
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum MailParameter {
     /// `BODY` parameter
     Body(MailBodyParameter),
@@ -227,10 +215,7 @@ impl Display for MailParameter {
 
 /// Values for the `BODY` parameter to `MAIL FROM`
 #[derive(PartialEq, Eq, Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum MailBodyParameter {
     /// `7BIT`
     SevenBit,
@@ -249,10 +234,7 @@ impl Display for MailBodyParameter {
 
 /// A `RCPT TO` extension parameter
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum RcptParameter {
     /// Custom parameter
     Other {
diff --git a/lettre/src/smtp/mod.rs b/lettre/src/smtp/mod.rs
index 298b0d6..9018bb9 100644
--- a/lettre/src/smtp/mod.rs
+++ b/lettre/src/smtp/mod.rs
@@ -65,10 +65,7 @@ pub enum ClientSecurity {
 
 /// Configures connection reuse behavior
 #[derive(Clone, Debug, Copy)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum ConnectionReuseParameters {
     /// Unlimited connection reuse
     ReuseUnlimited,
diff --git a/lettre/src/smtp/response.rs b/lettre/src/smtp/response.rs
index 6273797..db3e8a0 100644
--- a/lettre/src/smtp/response.rs
+++ b/lettre/src/smtp/response.rs
@@ -17,10 +17,7 @@ use std::string::ToString;
 
 /// First digit indicates severity
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum Severity {
     /// 2yx
     PositiveCompletion = 2,
@@ -40,10 +37,7 @@ impl Display for Severity {
 
 /// Second digit
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum Category {
     /// x0z
     Syntax = 0,
@@ -67,10 +61,7 @@ impl Display for Category {
 
 /// The detail digit of a response code (third digit)
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub enum Detail {
     #[allow(missing_docs)]
     Zero = 0,
@@ -102,10 +93,7 @@ impl Display for Detail {
 
 /// Represents a 3 digit SMTP response code
 #[derive(PartialEq, Eq, Copy, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct Code {
     /// First digit of the response code
     pub severity: Severity,
@@ -136,10 +124,7 @@ impl Code {
 ///
 /// The text message is optional, only the code is mandatory
 #[derive(PartialEq, Eq, Clone, Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct Response {
     /// Response code
     pub code: Code,
diff --git a/lettre/src/smtp/util.rs b/lettre/src/smtp/util.rs
index 7e006b7..f16c790 100644
--- a/lettre/src/smtp/util.rs
+++ b/lettre/src/smtp/util.rs
@@ -4,10 +4,7 @@ use std::fmt::{Display, Formatter, Result as FmtResult};
 
 /// Encode a string as xtext
 #[derive(Debug)]
-#[cfg_attr(
-    feature = "serde-impls",
-    derive(serde::Serialize, serde::Deserialize)
-)]
+#[cfg_attr(feature = "serde-impls", derive(serde::Serialize, serde::Deserialize))]
 pub struct XText<'a>(pub &'a str);
 
 impl<'a> Display for XText<'a> {