Add python_imap_usage.md

python_imap_usage.md

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+# Python SMTP usage
+
+Two examples of how to use the builtin IMAP library. 
+
+## Reading messages
+
+```
+import os
+import base64
+import env
+
+if not env.secret:
+    raise Exception("Environment issue.")
+
+import imaplib
+import email
+from email.header import decode_header
+
+imap_server = "mail.molodetz.nl" 
+email_user = "retoor@molodetz.nl"
+email_password = env.secret
+
+try:
+    mail = imaplib.IMAP4_SSL(imap_server)
+    mail.login(email_user, email_password)
+    mail.select("inbox")
+
+    while True:
+        status, messages = mail.search(None, "ALL")
+        email_ids = messages[0].split()
+
+        for email_id in email_ids[-1:]:
+            status, msg_data = mail.fetch(email_id, "(RFC822)")
+
+            for response_part in msg_data:
+                if isinstance(response_part, tuple):
+                    msg = email.message_from_bytes(response_part[1])
+                    subject, encoding = decode_header(msg["Subject"])[0]
+                    if isinstance(subject, bytes):
+                        subject = subject.decode(encoding or "utf-8")
+                    print(f"Subject: {subject}")
+
+                    from_ = msg.get("From")
+                    print(f"From: {from_}")
+                    
+                    if from_ == "retoor@molodetz.nl":
+                        mail.store(email_id, '+FLAGS', '\\Deleted')
+                        mail.expunge()
+
+                    if msg.is_multipart():
+                        for part in msg.walk():
+                            content_type = part.get_content_type()
+                            content_disposition = str(part.get("Content-Disposition"))
+                            if content_type == "text/plain" and "attachment" not in content_disposition:
+                                body = part.get_payload(decode=True).decode()
+                                print(f"Body: {body}")
+                    else:
+                        body = msg.get_payload(decode=True).decode()
+                        print(f"Body: {body}")
+
+    mail.logout()
+
+except Exception as e:
+    print(f"Error: {e}")
+
+```
+
+Sending email (requires my AsyncioPath made in other gist):
+
+```
+class SMTP(AsyncioPatch):
+
+    def __init__(self, smtp_server, port, sender_email, password):
+        self.smtp_server = smtp_server 
+        self.port = port
+        self.sender_email = sender_email
+        self.password = password
+        self.server = None
+
+    def connect(self):
+        self.server = smtplib.SMTP(self.smtp_server, self.port)
+        print("Connected to:",self.smtp_server)
+        self.server.starttls()
+        self.server.login(self.sender_email, self.password)  
+        print("Logged in as:", self.sender_email)
+    
+    def close(self):
+        self.server.quit()  
+        self.server = None
+        print("Server disconnected")
+
+
+    def __enter__(self):
+        self.connect()
+        return self 
+
+    def __exit__(self, *args, **kwargs):
+        self.close()
+
+    def send_mail(self, recipient_email, subject, body):
+        msg = MIMEMultipart()
+        msg["From"] = self.sender_email
+        msg["To"] = recipient_email
+        msg["Subject"] = subject
+        msg.attach(MIMEText(body, "plain"))
+
+        try:
+            self.server.sendmail(self.sender_email, recipient_email, msg.as_string())
+            print("Email sent successfully!")
+
+        except Exception as e:
+            print(f"Error: {e}")
+
+        finally:
+            pass
+
+
+# Email configuration
+server = SMTP(smtp_server = "mail.molodetz.nl",  # Replace with your SMTP server
+        port = 587,                        # Usually 587 for TLS, 465 for SSL
+        sender_email = "retoor@molodetz.nl",
+        password = secret)
+
+with server:
+    for x in range(10):
+        server.send_mail(
+            recipient_email = "retoor@molodetz.nl",
+            subject="Email nr {}".format(x),
+            body="Email body nr{}".format(x)
+        )
+
+async def test_async():
+    async with server:
+        for x in range(10):
+            await server.asend_mail(
+                recipient_email = "retoor@molodetz.nl",
+                subject="Email nr {}".format(x),
+                body="Email body nr{}".format(x)
+            )
+
+asyncio.run(test_async())
+
+
+
+```