diff --git a/CHANGELOG.md b/CHANGELOG.md
index 333d120..9a00487 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,12 +3,14 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [2.0.0] - unreleased
+
 - Mailer has been removed. It has been replaced by Dialer and Sender.
 - `File` type and the `CreateFile` and `OpenFile` functions have been removed.
 - `Message.Attach` and `Message.Embed` have a new signature.
 - `Message.GetBodyWriter` has been removed. Use `Message.AddAlternativeWriter`
 instead.
 - `Message.Export` has been removed. `Message.WriteTo` can be used instead.
+- `Message.DelHeader` has been removed.
 - The `Bcc` header field is no longer sent. It is far more simpler and
 efficient: the same message is sent to all recipients instead of sending a
 different email to each Bcc address.
diff --git a/message.go b/message.go
index 2a16c56..2ccf4e1 100644
--- a/message.go
+++ b/message.go
@@ -193,11 +193,6 @@ func (m *Message) GetHeader(field string) []string {
 	return m.header[field]
 }
 
-// DelHeader deletes a header field.
-func (m *Message) DelHeader(field string) {
-	delete(m.header, field)
-}
-
 // SetBody sets the body of the message.
 func (m *Message) SetBody(contentType, body string) {
 	m.parts = []part{