diff --git a/template/template.txt b/template/template.txt
index d40ffb0..7316130 100644
--- a/template/template.txt
+++ b/template/template.txt
@@ -29,6 +29,7 @@ Subject: [rss2email] {{.Subject}}
 X-RSS-Link: {{.Link}}
 X-RSS-Feed: {{.Feed}}
 X-RSS-GUID: {{.RSSItem.GUID}}
+Content-Base: {{.Link}}
 Mime-Version: 1.0
 
 --21ee3da964c7bf70def62adb9ee1a061747003c026e363e47231258c48f1
diff --git a/template/template_test.go b/template/template_test.go
index 5eb54ee..61e34d6 100644
--- a/template/template_test.go
+++ b/template/template_test.go
@@ -4,7 +4,7 @@ import "testing"
 
 func TestTemplate(t *testing.T) {
 	content := EmailTemplate()
-	if len(content) != 2241 {
-		t.Fatalf("unexpected template size 2241 != %d", len(content))
+	if len(content) != 2265 {
+		t.Fatalf("unexpected template size 2265 != %d", len(content))
 	}
 }