From 8e7cc3bc6395db451431541daee3941b90b32a7c Mon Sep 17 00:00:00 2001
From: Phil <philgibbons@ncltech.org>
Date: Thu, 14 May 2026 21:32:27 +0100
Subject: [PATCH] Added first version of the script

---
 smtp-downloader.sh | 189 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 smtp-downloader.sh

diff --git a/smtp-downloader.sh b/smtp-downloader.sh
new file mode 100644
index 0000000..ccd4b83
--- /dev/null
+++ b/smtp-downloader.sh
@@ -0,0 +1,189 @@
+import imaplib
+import email
+from email.header import decode_header
+import os
+from pathlib import Path
+import paramiko
+
+# =========================
+# EMAIL CONFIG
+# =========================
+IMAP_SERVER = "outlook.office365.com"
+EMAIL_ACCOUNT = "mailbox@company.com"
+PASSWORD = "your_password"
+
+MAIL_FOLDERS = ["Inbox", "Orders"]
+
+# =========================
+# SFTP CONFIG
+# =========================
+SFTP_HOST = "sftp.company.com"
+SFTP_PORT = 22
+SFTP_USERNAME = "sftpuser"
+SSH_KEY_PATH = "/home/youruser/.ssh/id_rsa"
+SSH_KEY_PASSPHRASE = None
+
+# =========================
+# RULES
+# =========================
+RULES = [
+    {
+        "from_contains": "supplier1@company.com",
+        "to_contains": "orders@yourcompany.com",
+        "remote_path": "/incoming/orders"
+    },
+    {
+        "from_contains": "reports@vendor.com",
+        "to_contains": "reports@yourcompany.com",
+        "remote_path": "/incoming/reports"
+    }
+]
+
+TEMP_DOWNLOAD = "/tmp/mail_attachments"
+
+# =========================
+# HELPERS
+# =========================
+def ensure_folder(path):
+    Path(path).mkdir(parents=True, exist_ok=True)
+
+def clean_subject(subject):
+    if not subject:
+        return "No Subject"
+    parts = decode_header(subject)
+    decoded_subject = ""
+    for part, encoding in parts:
+        if isinstance(part, bytes):
+            decoded_subject += part.decode(encoding or "utf-8", errors="ignore")
+        else:
+            decoded_subject += part
+    return decoded_subject
+
+def decode_filename(filename):
+    if not filename:
+        return "unknown"
+    parts = decode_header(filename)
+    decoded_name = ""
+    for part, encoding in parts:
+        if isinstance(part, bytes):
+            decoded_name += part.decode(encoding or "utf-8", errors="ignore")
+        else:
+            decoded_name += part
+    return decoded_name
+
+# =========================
+# SFTP CONNECTION
+# =========================
+def create_sftp_connection():
+    try:
+        key = paramiko.RSAKey.from_private_key_file(
+            SSH_KEY_PATH,
+            password=SSH_KEY_PASSPHRASE
+        )
+        transport = paramiko.Transport((SFTP_HOST, SFTP_PORT))
+        transport.connect(username=SFTP_USERNAME, pkey=key)
+        sftp = paramiko.SFTPClient.from_transport(transport)
+        return sftp, transport
+    except Exception as e:
+        print(f"SFTP connection failed: {e}")
+        return None, None
+
+# =========================
+# UPLOAD FILE
+# =========================
+def upload_to_sftp(local_file, remote_folder):
+    sftp, transport = create_sftp_connection()
+    if not sftp:
+        print("Skipping upload due to SFTP connection error")
+        return
+    try:
+        filename = os.path.basename(local_file)
+        remote_path = f"{remote_folder}/{filename}"
+        print(f"Uploading {filename} -> {remote_path}")
+        sftp.put(local_file, remote_path)
+        print("Upload successful")
+    except Exception as e:
+        print(f"Failed to upload {filename}: {e}")
+    finally:
+        sftp.close()
+        transport.close()
+
+# =========================
+# PROCESS EMAIL
+# =========================
+def process_email(msg):
+    from_addr = msg.get("From", "").lower()
+    to_addr = msg.get("To", "").lower()
+    subject = clean_subject(msg.get("Subject"))
+
+    print("\n====================")
+    print(f"FROM: {from_addr}")
+    print(f"TO: {to_addr}")
+    print(f"SUBJECT: {subject}")
+
+    matching_rule = None
+    for rule in RULES:
+        if rule["from_contains"].lower() in from_addr and rule["to_contains"].lower() in to_addr:
+            matching_rule = rule
+            break
+
+    if not matching_rule:
+        print("No matching rule")
+        return
+
+    remote_folder = matching_rule["remote_path"]
+
+    for part in msg.walk():
+        content_disposition = str(part.get("Content-Disposition"))
+        if "attachment" not in content_disposition.lower():
+            continue
+
+        filename = decode_filename(part.get_filename())
+        ensure_folder(TEMP_DOWNLOAD)
+        local_path = os.path.join(TEMP_DOWNLOAD, filename)
+        with open(local_path, "wb") as f:
+            f.write(part.get_payload(decode=True))
+        print(f"Saved attachment locally: {local_path}")
+
+        upload_to_sftp(local_path, remote_folder)
+
+# =========================
+# MAIN
+# =========================
+def main():
+    try:
+        mail = imaplib.IMAP4_SSL(IMAP_SERVER)
+        mail.login(EMAIL_ACCOUNT, PASSWORD)
+        print("Connected to mailbox")
+    except Exception as e:
+        print(f"Failed to connect/login: {e}")
+        return
+
+    for folder in MAIL_FOLDERS:
+        print(f"\nChecking folder: {folder}")
+        status, _ = mail.select(folder)
+        if status.decode() != "OK":
+            print(f"Cannot access folder: {folder}")
+            continue
+
+        status, messages = mail.search(None, "UNSEEN")
+        if status.decode() != "OK":
+            continue
+
+        email_ids = messages[0].split()
+        print(f"Found {len(email_ids)} unread emails")
+
+        for email_id in email_ids:
+            status, msg_data = mail.fetch(email_id, "(RFC822)")
+            if status.decode() != "OK":
+                continue
+            raw_email = msg_data[0][1]
+            msg = email.message_from_bytes(raw_email)
+            process_email(msg)
+            mail.store(email_id, '+FLAGS', '\\Seen')
+
+    mail.logout()
+    print("\nFinished")
+
+if __name__ == "__main__":
+    main()