From 0b65e904d833868fa392ed9b280e67f2ef46689e Mon Sep 17 00:00:00 2001
From: Carlos Alberto Costa Beppler <carlos.beppler@mps.com.br>
Date: Fri, 6 Sep 2019 17:07:37 -0300
Subject: [PATCH] Allows specify the sender used on SMTP conversation with
 outgoing server.

---
 config.go |  1 +
 main.go   | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/config.go b/config.go
index 01c6700..6239ddf 100644
--- a/config.go
+++ b/config.go
@@ -25,6 +25,7 @@ var (
 	remoteHost        = flag.String("remote_host", "smtp.gmail.com:587", "Outgoing SMTP server")
 	remoteUser        = flag.String("remote_user", "", "Username for authentication on outgoing SMTP server")
 	remotePass        = flag.String("remote_pass", "", "Password for authentication on outgoing SMTP server")
+	remoteSender      = flag.String("remote_sender", "", "Sender username for messages on outgoing SMTP server")
 	versionInfo       = flag.Bool("version", false, "Show version information")
 )
 
diff --git a/main.go b/main.go
index b11073c..eed758a 100644
--- a/main.go
+++ b/main.go
@@ -117,10 +117,18 @@ func mailHandler(peer smtpd.Peer, env smtpd.Envelope) error {
 
 	log.Printf("delivering using smarthost %s\n", *remoteHost)
 
+	var sender string
+
+	if *remoteSender == "" {
+		sender = env.Sender
+	} else {
+		sender = *remoteSender
+	}
+
 	err := SendMail(
 		*remoteHost,
 		auth,
-		env.Sender,
+		sender,
 		env.Recipients,
 		env.Data,
 	)