Support List-Unsubscribe header (#19)

Co-authored-by: William Di Luigi <[email protected]>

mailipy/gen.py

@@ -157,6 +157,9 @@ def render_template(template, data):
         if "reply-to" in config:
             msg["Reply-To"] = config["reply-to"]
 
+        if "list-unsubscribe" in config:
+            msg["List-Unsubscribe"] = config["list-unsubscribe"]
+
         msg["Subject"] = config["subject"]
         msg["Date"] = email.utils.formatdate()
         msg["Message-Id"] = config["msgid"] % (str(int(datetime.datetime.timestamp(datetime.datetime.now()))) + str(random.random()))

mailipy/gen_test.py

@@ -28,6 +28,7 @@ def test_create_two_emails(tmp_path):
 reply-to: "[email protected]"
 subject:  "Invitation for {{name}}"
 msgid:    "<%[email protected]>"
+list-unsubscribe: "<mailto: [email protected]?subject=Bye>"
 attach:
   - "test.png"
 images:
@@ -59,6 +60,7 @@ def test_create_two_emails(tmp_path):
         assert '[email protected]' in msg['cc']
         assert '[email protected]' in msg['bcc']
         assert '[email protected]' in msg['reply-to']
+        assert 'mailto: [email protected]' in msg['list-unsubscribe']
 
         multipart, attachment, embedded_image = msg.get_payload()
         plaintext, html = multipart.get_payload()

sample_template.md

@@ -6,6 +6,7 @@ cc:       []
 bcc:      []
 subject:  "Invito per il terzo round di allenamento delle ITACPC 🍕"
 msgid:    "<%[email protected]>"
+list-unsubscribe: "<mailto: [email protected]?subject=Bye>"
 attach:   []
 images:
   - path: "./logo.png"