Initial commit

internal/smtpserver/session.go

@@ -0,0 +1,14 @@
+package smtpserver
+
+import (
+	"fmt"
+	"strings"
+)
+
+func parseAddress(email string) (string, string, error) {
+	at := strings.LastIndex(email, "@")
+	if at == 0 {
+		return "", "", fmt.Errorf("invalid email address")
+	}
+	return email[:at], email[at+1:], nil
+}