Fix: Date-Header in Outreach-Mails (Spam-Prävention)

backend/routes/outreach.py

@@ -6,7 +6,7 @@ import smtplib
 import ssl
 from email.mime.text import MIMEText
 from email.mime.multipart import MIMEMultipart
-from email.utils import formataddr
+from email.utils import formataddr, formatdate
 from datetime import datetime
 from typing import List, Optional
 
@@ -87,6 +87,7 @@ def _imap_save_sent(msg_bytes: bytes, account: str):
 def _build_message(to: str, subject: str, body: str, account: str, html: str = None) -> MIMEMultipart:
     acc = _ACCOUNTS.get(account) or _ACCOUNTS["partner"]
     msg = MIMEMultipart("alternative")
+    msg["Date"]     = formatdate(localtime=True)
     msg["Subject"]  = subject
     msg["From"]     = formataddr((acc["name"], acc["from"]))
     msg["To"]       = to