Python SMTP：电子邮件合并为一个

Question

objective是一次给两个人发邮件。我准备电子邮件。我遍历这些对并发送电子邮件。

我有以下代码。

msgRoot = MIMEMultipart('related')
msgRoot['Subject'] = 'SUBJECT'
msgRoot['From'] = formataddr(('SENDER NAME', strFrom))
msgRoot.preamble = 'This is a multi-part message in MIME format.'

# Encapsulate the plain and HTML versions of the message body in an
# 'alternative' part, so message agents can decide which they want to display.
msgAlternative = MIMEMultipart('alternative')
msgRoot.attach(msgAlternative)

msgText = MIMEText('PLAINTEXT')
msgAlternative.attach(msgText)

# We reference the image in the IMG SRC attribute by the ID we give it below
with open('index.htm', 'r') as fp:
    msgText = MIMEText(fp.read(), 'html')
msgAlternative.attach(msgText)

# This example assumes the image is in the current directory
with open('download.png', 'rb') as fp:
    msgImage = MIMEImage(fp.read())

# Define the image's ID as referenced above
msgImage.add_header('Content-ID', '<imagesss>')
msgRoot.attach(msgImage)


conn = smtplib.SMTP('email-smtp.us-east-1.amazonaws.com', 587)
conn.starttls()
conn.login('user', 'password')
for pairs in paired_users:
    strTo = ', '.join(pairs)
    msgRoot['To'] = strTo
    print strTo
    conn.sendmail(strFrom, strTo, msgRoot.as_string())
conn.quit()

您可以清楚地看到邮件是分开发送的。

但由于某种原因，当我收到电子邮件时，每个人都在收件人列表中。就像有一封电子邮件与发送列表合并在一起。

是否可以解释这种行为并使其不再发生？ SMTP 服务器上的某些设置或要在邮件中设置的某些设置 header?

Answer 1

行：

msgRoot['To'] = strTo

并没有按照您的想法进行 - 它不会覆盖现有的 'To' header，它会添加另一个。从 docs 到 Message.__setitem__:

Note that this does not overwrite or delete any existing header with the same name. If you want to ensure that the new header is the only one present in the message with field name name, delete the field first, e.g.:

>>> del msg['subject']

>>> msg['subject'] = 'Python roolz!'

Python SMTP：电子邮件合并为一个

Python SMTP: emails being combined into one

python

email

smtp

amazon-ses