diff --git a/src/net/sendmail/sendmailTransport.cpp b/src/net/sendmail/sendmailTransport.cpp
index dbbb55a8..82501575 100644
--- a/src/net/sendmail/sendmailTransport.cpp
+++ b/src/net/sendmail/sendmailTransport.cpp
@@ -139,7 +139,7 @@ void sendmailTransport::noop()
 void sendmailTransport::send
 	(const mailbox& expeditor, const mailboxList& recipients,
 	 utility::inputStream& is, const utility::stream::size_type size,
-         utility::progressListener* progress)
+	 utility::progressListener* progress, const mailbox& sender)
 {
 	// If no recipient/expeditor was found, throw an exception
 	if (recipients.isEmpty())
@@ -152,7 +152,12 @@ void sendmailTransport::send
 
 	args.push_back("-i");
 	args.push_back("-f");
-	args.push_back(expeditor.getEmail().generate());
+
+	if (!sender.isEmpty())
+		args.push_back(expeditor.getEmail().generate());
+	else
+		args.push_back(sender.getEmail().generate());
+
 	args.push_back("--");
 
 	for (int i = 0 ; i < recipients.getMailboxCount() ; ++i)
diff --git a/src/net/smtp/SMTPTransport.cpp b/src/net/smtp/SMTPTransport.cpp
index b95321f9..853ffe35 100644
--- a/src/net/smtp/SMTPTransport.cpp
+++ b/src/net/smtp/SMTPTransport.cpp
@@ -560,9 +560,10 @@ void SMTPTransport::noop()
 }
 
 
-void SMTPTransport::send(const mailbox& expeditor, const mailboxList& recipients,
-                         utility::inputStream& is, const utility::stream::size_type size,
-                         utility::progressListener* progress)
+void SMTPTransport::send
+	(const mailbox& expeditor, const mailboxList& recipients,
+	 utility::inputStream& is, const utility::stream::size_type size,
+	 utility::progressListener* progress, const mailbox& sender)
 {
 	if (!isConnected())
 		throw exceptions::not_connected();
@@ -586,7 +587,10 @@ void SMTPTransport::send(const mailbox& expeditor, const mailboxList& recipients
 		commands->addCommand(SMTPCommand::RSET());
 
 	// Emit the "MAIL" command
-	commands->addCommand(SMTPCommand::MAIL(expeditor));
+	if (!sender.isEmpty())
+		commands->addCommand(SMTPCommand::MAIL(sender));
+	else
+		commands->addCommand(SMTPCommand::MAIL(expeditor));
 
 	// Now, we will need to reset next time
 	m_needReset = true;
diff --git a/src/net/transport.cpp b/src/net/transport.cpp
index 1e2936ce..923441b7 100644
--- a/src/net/transport.cpp
+++ b/src/net/transport.cpp
@@ -139,6 +139,21 @@ void transport::send(ref <vmime::message> msg, utility::progressListener* progre
 		throw exceptions::no_expeditor();
 	}
 
+	// Extract sender
+	mailbox sender;
+
+	try
+	{
+		const mailbox& mbox = *msg->getHeader()->findField(fields::SENDER)->
+			getValue().dynamicCast <const mailbox>();
+
+		sender = mbox;
+	}
+	catch (exceptions::no_such_field&)
+	{
+		sender = expeditor;
+	}
+
 	// Extract recipients
 	mailboxList recipients;
 
@@ -211,7 +226,7 @@ void transport::send(ref <vmime::message> msg, utility::progressListener* progre
 
 	utility::inputStreamStringAdapter isAdapter(str);
 
-	send(expeditor, recipients, isAdapter, str.length(), progress);
+	send(expeditor, recipients, isAdapter, str.length(), progress, sender);
 }
 
 
diff --git a/vmime/net/sendmail/sendmailTransport.hpp b/vmime/net/sendmail/sendmailTransport.hpp
index 876db6ea..7f8e4d77 100644
--- a/vmime/net/sendmail/sendmailTransport.hpp
+++ b/vmime/net/sendmail/sendmailTransport.hpp
@@ -64,7 +64,13 @@ public:
 
 	void noop();
 
-	void send(const mailbox& expeditor, const mailboxList& recipients, utility::inputStream& is, const utility::stream::size_type size, utility::progressListener* progress = NULL);
+	void send
+		(const mailbox& expeditor,
+		 const mailboxList& recipients,
+		 utility::inputStream& is,
+		 const utility::stream::size_type size,
+		 utility::progressListener* progress = NULL,
+		 const mailbox& sender = mailbox());
 
 	bool isSecuredConnection() const;
 	ref <connectionInfos> getConnectionInfos() const;
diff --git a/vmime/net/smtp/SMTPTransport.hpp b/vmime/net/smtp/SMTPTransport.hpp
index 20f4bc52..435aff39 100644
--- a/vmime/net/smtp/SMTPTransport.hpp
+++ b/vmime/net/smtp/SMTPTransport.hpp
@@ -68,7 +68,13 @@ public:
 
 	void noop();
 
-	void send(const mailbox& expeditor, const mailboxList& recipients, utility::inputStream& is, const utility::stream::size_type size, utility::progressListener* progress = NULL);
+	void send
+		(const mailbox& expeditor,
+		 const mailboxList& recipients,
+		 utility::inputStream& is,
+		 const utility::stream::size_type size,
+		 utility::progressListener* progress = NULL,
+		 const mailbox& sender = mailbox());
 
 	bool isSecuredConnection() const;
 	ref <connectionInfos> getConnectionInfos() const;
diff --git a/vmime/net/transport.hpp b/vmime/net/transport.hpp
index e39e3fd1..cadde20f 100644
--- a/vmime/net/transport.hpp
+++ b/vmime/net/transport.hpp
@@ -74,8 +74,15 @@ public:
 	  * @param is input stream provding message data (header + body)
 	  * @param size size of the message data
 	  * @param progress progress listener, or NULL if not used
+	  * @param sender envelope sender (if empty, expeditor will be used)
 	  */
-	virtual void send(const mailbox& expeditor, const mailboxList& recipients, utility::inputStream& is, const utility::stream::size_type size, utility::progressListener* progress = NULL) = 0;
+	virtual void send
+		(const mailbox& expeditor,
+		 const mailboxList& recipients,
+		 utility::inputStream& is,
+		 const utility::stream::size_type size,
+		 utility::progressListener* progress = NULL,
+		 const mailbox& sender = mailbox()) = 0;
 
 
 	Type getType() const;