Parse to and subject mail headers

honeypot/smtp/server.go

@@ -3,6 +3,7 @@ package smtp
 import (
 	"bytes"
 	"io"
+	"net/mail"
 	"time"
 
 	smtplib "github.com/emersion/go-smtp"
@@ -70,11 +71,22 @@ func (sess *session) Data(r io.Reader) error {
 
 	sess.mail.Data = buf.String()
 
+	var toAddr string
+	var subject string
+	// Parse mail headers
+	msg, err := mail.ReadMessage(&buf)
+	if err != nil {
+		sess.honeypot.Logger.Infow("Unable to parse mail.", "error", err, "remote_addr", sess.remoteAddr)
+	} else {
+		toAddr = msg.Header.Get("To")
+		subject = msg.Header.Get("Subject")
+	}
+
 	if err := sess.honeypot.Store.AddMailData(&sess.mail); err != nil {
 		sess.honeypot.Logger.Warnw("Error storing maildata.", "error", err, "remote_addr", sess.remoteAddr)
 		return smtplib.ErrDataTooLarge
 	}
-	sess.honeypot.Logger.Infow("Mail received", "from", sess.mail.From, "remote_addr", sess.remoteAddr, "size", len(sess.mail.Data))
+	sess.honeypot.Logger.Infow("Mail received", "from", sess.mail.From, "to", toAddr, "subject", subject, "remote_addr", sess.remoteAddr, "size", len(sess.mail.Data))
 
 	return nil
 }

version.go

@@ -5,7 +5,7 @@ import (
 	"runtime"
 )
 
-var Version = "v0.1.25"
+var Version = "v0.1.26"
 var Build string
 
 func FullVersion() string {