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I'm creating an app that automatically sends emails to different users of a Google Group, where the email sender is the Google Group address.

The app is written in Python and is using Mandrill to send the emails. The distribution of the emails is working properly, but I need to sender email to be the Google Group. I have it setup as an alias on my Gmail, which allows me to manually select the alias and send emails from the Google Groups address. I am looking for a way to automatically send the emails from the alias without me having to manually send it from Gmail.

You can try using the Users.settings.sendAs resource.

Settings associated with a send-as alias, which can be either the
primary login address associated with the account or a custom "from"
address. Send-as aliases correspond to the "Send Mail As" feature in
the web interface.

{

  "sendAsEmail": string,

  "displayName": string,

  "replyToAddress": string,

  "signature": string,

  "isPrimary": boolean,

  "isDefault": boolean,

  "treatAsAlias": boolean,

  "smtpMsa": {

    "host": string,

    "port": integer,

    "username": string,

    "password": string,

    "securityMode": string

  },

  "verificationStatus": string

}

The sendAsEmail property of this resource stands for the email address that appears in the "From:" header for mail sent using this alias. This is read-only for all operations except create.

For other information about managing aliases, you can check out this documentation.

Here is code example how to send email via SMTP by using python. You can configure "From" field so it will be used as sender. Please pay attention there are python libraries being used: smtplib, os and email.

import os

import smtplib



from email.mime.multipart import MIMEMultipart

from email.mime.text import MIMEText



msg = MIMEMultipart('alternative')



msg['Subject'] = "Hello from Mandrill, Python style!"

msg['From']    = "John Doe <john@doe.com>" # Your from name and email address

msg['To']      = "recipient@example.com"



text = "Mandrill speaks plaintext"

part1 = MIMEText(text, 'plain')



html = "<em>Mandrill speaks <strong>HTML</strong></em>"

part2 = MIMEText(html, 'html')



username = os.environ['MANDRILL_USERNAME']

password = os.environ['MANDRILL_PASSWORD']



msg.attach(part1)

msg.attach(part2)



s = smtplib.SMTP('smtp.mandrillapp.com', 587)



s.login(username, password)

s.sendmail(msg['From'], msg['To'], msg.as_string())



s.quit()

For more information check this link How to Send via SMTP with Popular Programming Languages?