Send email from Python over SMTP

Python's smtplib talks SMTP directly. Point it at Unitpost on port 587 with STARTTLS. Django and Flask wrap this; this page is the bare client.

1. 1

   Send with smtplib

   Python

   import os
   import smtplib
   from email.message import EmailMessage
   
   msg = EmailMessage()
   msg["From"] = "you@yourdomain.com"
   msg["To"] = "customer@example.com"
   msg["Subject"] = "Hello from Python"
   msg.set_content("Sent via SMTP.")
   msg.add_alternative("<p>Sent via SMTP.</p>", subtype="html")
   
   with smtplib.SMTP("smtp.unitpost.com", 587) as smtp:
       smtp.starttls()
       smtp.login("unitpost", os.environ["UNITPOST_API_KEY"])
       smtp.send_message(msg)

2. 2

   Framework wrappers

   Using a framework? Django, Flask, FastAPI.