将原始电子邮件（带附件）发送给多个收件人

我目前正在使用 Python 2.7 并尝试使用 Boto SES 将带有附件（确切地说是 CSV）的原始电子邮件发送到多个地址。我可以发送普通电子邮件send_email()，但是当我尝试通过以下方式发送给多个人时，我不断收到错误消息send_raw_email().

这是我在使用逗号分隔的收件人字符串时遇到的错误：

Error sending email: SESIllegalAddressError: 400 Illegal address
<ErrorResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
  <Error>
    <Type>Sender</Type>
    <Code>InvalidParameterValue</Code>
    <Message>Illegal address</Message>
  </Error>
  <RequestId>[the request ID]</RequestId>
</ErrorResponse>

这是使用这段代码的结果：

to_emails = "[email protected], [email protected]"

# create raw email
msg = MIMEMultipart()
msg['Subject'] = 'Email subject'
msg['From'] = '[email protected]'
msg['To'] = to_emails

part = MIMEText('Attached is an important CSV')
msg.attach(part)

part = MIMEApplication(open(fname, 'rb').read())
part.add_header('Content-Disposition', 'attachment', filename=fname)
msg.attach(part)
# end create raw email

conn = boto.ses.connect_to_region(
    '[my region]',
    aws_access_key_id=s3_access_key, 
    aws_secret_access_key=s3_secret_key
    )
conn.send_raw_email(msg.as_string(),
    source=msg['From'],
    destinations=msg['To']
    )

另外，这是我使用收件人字符串数组时得到的错误：

Error sending email: 'list' object has no attribute 'lstrip'

如果我只有一个收件人，它就可以正常工作，因此当我有一组收件人和一个以逗号分隔的收件人字符串时，它只会抛出错误。有人对此有经验吗？

在查看了一些文档和更多的试验和错误后，我结束了它。事实证明，我只需加入电子邮件字符串数组即可msg['To']，然后我可以传递电子邮件数组destinations范围。

这就是我所做的：

to_emails = "[email protected], [email protected]"

COMMASPACE = ', '

# create raw email
msg = MIMEMultipart()
msg['Subject'] = 'Email subject'
msg['From'] = '[email protected]'
msg['To'] = COMMASPACE.join(to_emails)  ## joined the array of email strings
# edit: didn't end up using this ^

part = MIMEText('Attached is an important CSV')
msg.attach(part)

part = MIMEApplication(open(fname, 'rb').read())
part.add_header('Content-Disposition', 'attachment', filename=fname)
msg.attach(part)
# end create raw email

conn = boto.ses.connect_to_region(
    '[my region]',
    aws_access_key_id=s3_access_key, 
    aws_secret_access_key=s3_secret_key
    )
conn.send_raw_email(msg.as_string(),
    source=msg['From'],
    destinations=to_emails  ## passed in an array
    )