Python 2.7 has reached end of support
and will bedeprecatedon January 31, 2026. After deprecation, you won't be able to deploy Python 2.7
applications, even if your organization previously used an organization policy to
re-enable deployments of legacy runtimes. Your existing Python
2.7 applications will continue to run and receive traffic after theirdeprecation date. We recommend that
youmigrate to the latest supported version of Python.
Sending is asynchronous: themail.send_mail()function and theEmailMessage.send()method transmit the message data to the mail
service, then return. The mail service queues the message, then attempts to
send it, retrying if the destination mail server is unavailable. Errors and
bounce messages are sent to the sender address for the email message.
Before you begin
You must register your sender emails as authorized senders. For more
information, seewho can send email.
Sending mail withmail.send_mail()
To send mail using themail.send_mail()function, use the fields of the
email message as parameters, including the sender, the recipients, the subject
and the body of the message. For example:
mail.send_mail(sender=sender_address,to="Albert Johnson <Albert.Johnson@example.com>",subject="Your account has been approved",body="""Dear Albert:Your example.com account has been approved. You can now visithttp://www.example.com/ and sign in using your Google Account toaccess new features.Please let us know if you have any questions.The example.com Team""")
Sending mail withEmailMessage
To send mail using objects with theEmailMessageclass, pass the fields of the email message to
the EmailMessage constructor and use attributes of the instance to update
message.
TheEmailMessage.send()method sends the email message
represented by the instance's attributes. An application can re-use anEmailMessageinstance by modifying attributes and calling thesend()method
again.
message=mail.EmailMessage(sender=sender_address,subject="Your account has been approved")message.to="Albert Johnson <Albert.Johnson@example.com>"message.body="""Dear Albert:Your example.com account has been approved. You can now visithttp://www.example.com/ and sign in using your Google Account toaccess new features.Please let us know if you have any questions.The example.com Team"""message.send()
The following example demonstrates sending a message to confirm an email
address:
classUserSignupHandler(webapp2.RequestHandler):"""Serves the email address sign up form."""defpost(self):user_address=self.request.get('email_address')ifnotmail.is_email_valid(user_address):self.get()# Show the form again.else:confirmation_url=create_new_user_confirmation(user_address)sender_address=('Example.com Support<{}@appspot.gserviceaccount.com>'.format(app_identity.get_application_id()))subject='Confirm your registration'body="""Thank you for creating an account!Please confirm your email address by clicking on the link below:{}""".format(confirmation_url)mail.send_mail(sender_address,user_address,subject,body)
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThe mail API offers two methods for sending emails: the \u003ccode\u003email.send_mail()\u003c/code\u003e function and the \u003ccode\u003eEmailMessage\u003c/code\u003e class.\u003c/p\u003e\n"],["\u003cp\u003eEmail sending is asynchronous, meaning the function or method returns immediately after sending the message data to the mail service, which then queues and attempts delivery.\u003c/p\u003e\n"],["\u003cp\u003eTo use this API you need to register your sender emails as authorized senders.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003email.send_mail()\u003c/code\u003e function takes email fields as parameters, whereas the \u003ccode\u003eEmailMessage\u003c/code\u003e class uses attributes of an instance to construct and send emails.\u003c/p\u003e\n"],["\u003cp\u003eThis API can only run in first-generation runtimes in the App Engine standard environment.\u003c/p\u003e\n"]]],[],null,["# Sending Mail\n\nThe mail API provides two ways to send an email message: the\n[`mail.send_mail()`](/appengine/docs/legacy/standard/python/refdocs/google.appengine.api.mail#google.appengine.api.mail.send_mail) function and the [`EmailMessage`](/appengine/docs/legacy/standard/python/refdocs/google.appengine.api.mail#google.appengine.api.mail.EmailMessage) class.\n| This page describes how to use the legacy bundled services and APIs. This API can only run in first-generation runtimes in the App Engine standard environment. If you are updating to the App Engine Python 3 runtime, refer to the [migration guide](/appengine/migration-center/standard/migrate-to-second-gen/python-differences) to learn about your migration options for legacy bundled services.\n\nSending is asynchronous: the `mail.send_mail()` function and the\n`EmailMessage.send()` method transmit the message data to the mail\nservice, then return. The mail service queues the message, then attempts to\nsend it, retrying if the destination mail server is unavailable. Errors and\nbounce messages are sent to the sender address for the email message.\n\nBefore you begin\n----------------\n\nYou must register your sender emails as authorized senders. For more\ninformation, see\n[who can send email](/appengine/docs/legacy/standard/python/mail#who_can_send_mail).\n\nSending mail with `mail.send_mail()`\n------------------------------------\n\nTo send mail using the [`mail.send_mail()`](/appengine/docs/legacy/standard/python/refdocs/google.appengine.api.mail#google.appengine.api.mail.send_mail) function, use the fields of the\nemail message as parameters, including the sender, the recipients, the subject\nand the body of the message. For example: \n\n mail.send_mail(sender=sender_address,\n to=\"Albert Johnson \u003cAlbert.Johnson@example.com\u003e\",\n subject=\"Your account has been approved\",\n body=\"\"\"Dear Albert:\n\n Your example.com account has been approved. You can now visit\n http://www.example.com/ and sign in using your Google Account to\n access new features.\n\n Please let us know if you have any questions.\n\n The example.com Team\n \"\"\")\n\nSending mail with `EmailMessage`\n--------------------------------\n\nTo send mail using objects with the\n[`EmailMessage`](/appengine/docs/legacy/standard/python/refdocs/google.appengine.api.mail#google.appengine.api.mail.EmailMessage) class, pass the fields of the email message to\nthe EmailMessage constructor and use attributes of the instance to update\nmessage.\n\nThe [`EmailMessage.send()`](/appengine/docs/legacy/standard/python/refdocs/modules/google/appengine/api/mail#EmailMessage) method sends the email message\nrepresented by the instance's attributes. An application can re-use an\n`EmailMessage` instance by modifying attributes and calling the `send()` method\nagain. \n\n message = mail.EmailMessage(\n sender=sender_address,\n subject=\"Your account has been approved\")\n\n message.to = \"Albert Johnson \u003cAlbert.Johnson@example.com\u003e\"\n message.body = \"\"\"Dear Albert:\n\n Your example.com account has been approved. You can now visit\n http://www.example.com/ and sign in using your Google Account to\n access new features.\n\n Please let us know if you have any questions.\n\n The example.com Team\n \"\"\"\n message.send()\n\nThe following example demonstrates sending a message to confirm an email\naddress: \n\n class UserSignupHandler(webapp2.RequestHandler):\n \"\"\"Serves the email address sign up form.\"\"\"\n\n def post(self):\n user_address = self.request.get('email_address')\n\n if not mail.is_email_valid(user_address):\n self.get() # Show the form again.\n else:\n confirmation_url = create_new_user_confirmation(user_address)\n sender_address = (\n 'Example.com Support \u003c{}@appspot.gserviceaccount.com\u003e'.format(\n app_identity.get_application_id()))\n subject = 'Confirm your registration'\n body = \"\"\"Thank you for creating an account!\n Please confirm your email address by clicking on the link below:\n\n {}\n \"\"\".format(confirmation_url)\n mail.send_mail(sender_address, user_address, subject, body)\n\nSending bulk mail\n-----------------\n\nSee the [Bulk mail guidelines](/appengine/docs/legacy/standard/python/mail/bulk-mail) for considerations around sending bulk\nemail."]]
