kaushikparanjpe opened a new issue #16778: URL: https://github.com/apache/airflow/issues/16778
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These questions are the first thing we need to know to understand the context. --> **Apache Airflow version**: 2.1.0 **apache-airflow-providers-amazon version**: 1.4.0 **Kubernetes version (if you are using kubernetes)** (use `kubectl version`): **Environment**: - **Cloud provider or hardware configuration**: AWS EC2 - **OS** (e.g. from /etc/os-release): Amazon Linux 2 - **Kernel** (e.g. `uname -a`): - **Install tools**: - **Others**: **What happened**: Trying to integrate AWS SES SMTP service with Airflow to send emails on failures. Below are details in my `airflow.cfg` file: ``` [email] email_backend = airflow.providers.amazon.aws.utils.emailer.send_email email_conn_id = aws_default [smtp] smtp_host = email-smtp.us-east-1.amazonaws.com smtp_starttls = True smtp_ssl = False smtp_user = SMTP_USER_KEY smtp_port = 587 smtp_password = SMTP_PASSWORD smtp_mail_from = [email protected] ``` My Test DAG: ``` args = { 'owner': 'Data Platform', 'depends_on_past': False, 'start_date': datetime(2018, 11, 12, 0, 0, 0, 0), 'email': [Variable.get('smtp_pd_email')], 'email_on_failure': True, 'email_on_retry': False, 'retries': 1, 'retry_delay': timedelta(seconds=10), } dag_name = 'test_smtp' dag = DAG(dag_id=dag_name, default_args=args, schedule_interval='0 8 * * *') greet = BashOperator( task_id='csv_to_s3', bash_command=""" eccho "Hello world!" """, dag=dag) ``` **What you expected to happen**: With all the email and smtp configs and aws service setup, email should have been sent on DAG Failure. <!-- What do you think went wrong? --> But upon the DAG failure I was getting below error and no email was sent: ``` [2021-07-01 16:43:37,212] {taskinstance.py:1537} ERROR - Failed to send email to: ['[email protected]'] Traceback (most recent call last): File "/data/environments/airflow/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1137, in _run_raw_task self._prepare_and_execute_task_with_callbacks(context, task) File "/data/environments/airflow/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1311, in _prepare_and_execute_task_with_callbacks result = self._execute_task(context, task_copy) File "/data/environments/airflow/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1341, in _execute_task result = task_copy.execute(context=context) File "/data/environments/airflow/lib/python3.7/site-packages/airflow/operators/bash.py", line 180, in execute raise AirflowException('Bash command failed. The command returned a non-zero exit code.') airflow.exceptions.AirflowException: Bash command failed. The command returned a non-zero exit code. During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/data/environments/airflow/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1878, in email_alert send_email(self.task.email, subject, html_content) File "/data/environments/airflow/lib/python3.7/site-packages/airflow/utils/email.py", line 66, in send_email **kwargs, File "/data/environments/airflow/lib/python3.7/site-packages/airflow/providers/amazon/aws/utils/emailer.py", line 48, in send_email mime_charset=mime_charset, File "/data/environments/airflow/lib/python3.7/site-packages/airflow/providers/amazon/aws/hooks/ses.py", line 96, in send_email Source=mail_from, Destinations=recipients, RawMessage={'Data': message.as_string()} File "/data/environments/airflow/lib/python3.7/site-packages/botocore/client.py", line 357, in _api_call return self._make_api_call(operation_name, kwargs) File "/data/environments/airflow/lib/python3.7/site-packages/botocore/client.py", line 649, in _make_api_call api_params, operation_model, context=request_context) File "/data/environments/airflow/lib/python3.7/site-packages/botocore/client.py", line 697, in _convert_to_request_dict api_params, operation_model) File "/data/environments/airflow/lib/python3.7/site-packages/botocore/validate.py", line 297, in serialize_to_request raise ParamValidationError(report=report.generate_report()) botocore.exceptions.ParamValidationError: Parameter validation failed: Invalid type for parameter Source, value: None, type: <class 'NoneType'>, valid types: <class 'str'> ``` While tracking back the error I found the issue is with `airflow/providers/amazon/aws/utils/emailer.py`(Airflow module for email backend using AWS SES - refered to as emailer.py below). for `send_email` function in `emailer.py`. This function calls SESHook.send_email with parameter `mail_from=None`. This why getting `ParamValidationError` from `botocore` packages. Updating `emailer.py` with call to SESHook.send_email as below worked for me. ``` def send_email( to: Union[List[str], str], subject: str, html_content: str, files: Optional[List] = None, cc: Optional[Union[List[str], str]] = None, bcc: Optional[Union[List[str], str]] = None, mime_subtype: str = 'mixed', mime_charset: str = 'utf-8', conn_id: str = 'aws_default', **kwargs, ) -> None: """Email backend for SES.""" hook = SESHook(aws_conn_id=conn_id) hook.send_email( mail_from= conf.get('smtp', 'smtp_mail_from'), to=to, subject=subject, html_content=html_content, files=files, cc=cc, bcc=bcc, mime_subtype=mime_subtype, mime_charset=mime_charset, ) ``` **How to reproduce it**: - Create SES domain, verify email, generate SMTP credentials - Add details to config provided above - Might want to change smtp_host as per region you are looking for - Run the test DAG (code provided above) <!--- As minimally and precisely as possible. Keep in mind we do not have access to your cluster or dags. If you are using kubernetes, please attempt to recreate the issue using minikube or kind. ## Install minikube/kind - Minikube https://minikube.sigs.k8s.io/docs/start/ - Kind https://kind.sigs.k8s.io/docs/user/quick-start/ If this is a UI bug, please provide a screenshot of the bug or a link to a youtube video of the bug in action You can include images using the .md style of  To record a screencast, mac users can use QuickTime and then create an unlisted youtube video with the resulting .mov file. ---> **Anything else we need to know**: <!-- How often does this problem occur? Once? Every time etc? Any relevant logs to include? Put them here in side a detail tag: <details><summary>x.log</summary> lots of stuff </details> --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. 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