====== Google App Engine 发邮件 ======

===== 使用send_mail()函数发送邮件 =====

<code python>
from google.appengine.api import mail

mail.send_mail(sender="Example.com Support <support@example.com>",
              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 visit
http://www.example.com/ and sign in using your Google Account to
access new features.

Please let us know if you have any questions.

The example.com Team
""")
</code>


===== 使用EmailMessage类发送邮件  =====

<code python>
from google.appengine.api import mail

message = mail.EmailMessage(sender="Example.com Support <support@example.com>",
                            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 visit
http://www.example.com/ and sign in using your Google Account to
access new features.

Please let us know if you have any questions.

The example.com Team
"""

message.send()
</code>
===== GAE发送带附件邮件 =====
发送附件必须使用EmailMessage类，EmailMessage带有attachments成员变量。

EmailMessage的attachment成员是一个list，一个tuple的list，tuple含有2个元素，文件名与文件内容。


===== 参考 =====
  * http://code.google.com/appengine/docs/python/mail/sendingmail.html