ssl - 在 GCP Composer Airflow 中使用 AWS SES SMTP 服务器时出现 "SSL: WRONG_VERSION_NUMBER"

Question

我正在使用 GCP Composer (Airflow) 来运行一些计划任务。并使用 AWS SES SMTP 服务器发送通知电子邮件。
根据 GCP Composer 的文档，https://cloud.google.com/composer/docs/secret-manager#configuring_your_environment_with和 https://cloud.google.com/composer/docs/configure-email#configure_third-party_smtp_services ，我将 Airflow 配置覆盖设置如下

secrets
    backend airflow.providers.google.cloud.secrets.secret_manager.CloudSecretManagerBackend

smtp
    smtp_port 587
    smtp_mail_from ...
    smtp_host email-smtp.us-west-1.amazonaws.com
    smtp_starttls True
    smtp_password_secret smtp-password
    smtp_ssl True
    smtp_user ...
email
    email_backend airflow.utils.email.send_email_smtp

Airflow 发送邮件时出错:

Traceback (most recent call last)
  File "/usr/local/lib/airflow/airflow/models/taskinstance.py", line 1476, in email_aler
    send_email(self.task.email, subject, html_content
  File "/usr/local/lib/airflow/airflow/utils/email.py", line 62, in send_emai
    mime_subtype=mime_subtype, mime_charset=mime_charset, **kwargs
  File "/usr/local/lib/airflow/airflow/utils/email.py", line 108, in send_email_smt
    send_MIME_email(smtp_mail_from, recipients, msg, dryrun
  File "/usr/local/lib/airflow/airflow/utils/email.py", line 127, in send_MIME_emai
    s = smtplib.SMTP_SSL(SMTP_HOST, SMTP_PORT) if SMTP_SSL else smtplib.SMTP(SMTP_HOST, SMTP_PORT
  File "/opt/python3.6/lib/python3.6/smtplib.py", line 1031, in __init_
    source_address
  File "/opt/python3.6/lib/python3.6/smtplib.py", line 251, in __init_
    (code, msg) = self.connect(host, port
  File "/opt/python3.6/lib/python3.6/smtplib.py", line 336, in connec
    self.sock = self._get_socket(host, port, self.timeout
  File "/opt/python3.6/lib/python3.6/smtplib.py", line 1039, in _get_socke
    server_hostname=self._host
  File "/opt/python3.6/lib/python3.6/ssl.py", line 407, in wrap_socke
    _context=self, _session=session
  File "/opt/python3.6/lib/python3.6/ssl.py", line 817, in __init_
    self.do_handshake(
  File "/opt/python3.6/lib/python3.6/ssl.py", line 1077, in do_handshak
    self._sslobj.do_handshake(
  File "/opt/python3.6/lib/python3.6/ssl.py", line 689, in do_handshak
    self._sslobj.do_handshake(
ssl.SSLError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:852

如何解决这个 WRONG_VERSION_NUMBER 错误？

Answer 1

AWS SES SMTP 在端口 587 上启用 SSL 时出现问题。它需要禁用 SSL 才能在端口 587 上工作。
只需设置smtp_ssl至False在 Airflow 的配置设置中。