Send emails with Python

# settings.py — use Postmark as Django's email backend via SMTP

EMAIL_BACKEND       = "django.core.mail.backends.smtp.EmailBackend"
EMAIL_HOST          = "smtp.postmarkapp.com"
EMAIL_PORT          = 587
EMAIL_USE_TLS       = True
EMAIL_HOST_USER     = os.environ["POSTMARK_SERVER_TOKEN"]
EMAIL_HOST_PASSWORD = os.environ["POSTMARK_SERVER_TOKEN"]
DEFAULT_FROM_EMAIL  = "sender@example.com"

# Then send from anywhere in Django:
# from django.core.mail import send_mail
# send_mail("Subject", "Body", None, ["recipient@example.com"])

import asyncio
import os
import postmark
from flask import Flask, jsonify

app = Flask(__name__)

@app.route("/send", methods=["POST"])
def send_email():
    async def _send():
        async with postmark.ServerClient(os.environ["POSTMARK_SERVER_TOKEN"]) as client:
            return await client.outbound.send({
                "sender":    "sender@example.com",
                "to":        "recipient@example.com",
                "subject":   "Postmark test",
                "html_body": "<p>HTML body goes here</p>",
            })
    result = asyncio.run(_send())
    return jsonify({"message_id": result.message_id})

import os
import postmark
from fastapi import FastAPI

app = FastAPI()

@app.post("/send")
async def send_email():
    async with postmark.ServerClient(os.environ["POSTMARK_SERVER_TOKEN"]) as client:
        response = await client.outbound.send({
            "sender":    "sender@example.com",
            "to":        "recipient@example.com",
            "subject":   "Postmark test",
            "html_body": "<p>HTML body goes here</p>",
        })
    return {"message_id": response.message_id}

import os
import smtplib
from email.message import EmailMessage

# No extra dependencies needed — smtplib ships with Python.

token = os.environ["POSTMARK_SERVER_TOKEN"]

msg = EmailMessage()
msg["From"]    = "sender@example.com"
msg["To"]      = "recipient@example.com"
msg["Subject"] = "Postmark test"
msg.set_content("Plain text body goes here.")

with smtplib.SMTP("smtp.postmarkapp.com", 587) as smtp:
    smtp.starttls()
    smtp.login(token, token)
    smtp.send_message(msg)