[Python] How to make email content more appealing with bold titles in Python using NewsAPI?

I am building a simple Python app that fetches data from NewsAPI and sends the result as an email to a user-provided email address. The app works and successfully sends the email, but I want to make the email content more visually appealing—for instance, making the news titles bold. This is my code:

import os
from dotenv import load_dotenv
import requests
from send_email import send_email

load_dotenv()
key = os.getenv("API_NEWS_KEY")
def main():
url = f"https://newsapi.org/v2/everything?q=tesla&from=2025-03-06&sortBy=publishedAt&apiKey={key}"

request = requests.get(url)
content = request.json()

mail_Body = " **Latest News Articles about From NewsAPI** \n\n"
for article in content["articles"]:
if article["title"] is not None:
mail_Body += f"**Title:** {article['title']}\n"
mail_Body += f"**Description:** {article['description']}\n"
mail_Body += "-" * 40 + "\n\n"

user_email = input("Which email do you want to receive email? ")

# Ensure the email body is encoded in UTF-8
send_email(user_email, mail_Body)
print("Email sent!!!!")

if __name__ =="__main__":
main()


and my send_email function:

import smtplib, ssl
import os
from dotenv import load_dotenv
from email.message import EmailMessage

load_dotenv()
email = os.getenv("usernameemail")
email_password = os.getenv("password")

print(email)
print(email_password)

def send_email(receiver,news):
host = "smtp.gmail.com"
port = 465

username = email
password = email_password
message = EmailMessage()
message["From"] = username
message["To"] = receiver
message["Subject"] = "Latest new from API News"
message.set_content(f"This is the latest new from NewsApi: \n \n{news} ", charset ="utf-8")

context = ssl.create_default_context()

try:
with smtplib.SMTP_SSL(host, port, context=context) as server:
server.login(username, password)
print("Login successful")
server.send_message( message)
print("Email sent successfully")
except Exception as e:
print(f"An error occurred: {e}")

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