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Diffstat (limited to 'Doc/library/smtplib.rst')
| -rw-r--r-- | Doc/library/smtplib.rst | 65 |
1 files changed, 54 insertions, 11 deletions
diff --git a/Doc/library/smtplib.rst b/Doc/library/smtplib.rst index 3101ab7..711981f 100644 --- a/Doc/library/smtplib.rst +++ b/Doc/library/smtplib.rst @@ -20,7 +20,7 @@ details of SMTP and ESMTP operation, consult :rfc:`821` (Simple Mail Transfer Protocol) and :rfc:`1869` (SMTP Service Extensions). -.. class:: SMTP(host='', port=0, local_hostname=None[, timeout]) +.. class:: SMTP(host='', port=0, local_hostname=None[, timeout], source_address=None) A :class:`SMTP` instance encapsulates an SMTP connection. It has methods that support a full repertoire of SMTP and ESMTP operations. If the optional @@ -29,13 +29,34 @@ Protocol) and :rfc:`1869` (SMTP Service Extensions). raised if the specified host doesn't respond correctly. The optional *timeout* parameter specifies a timeout in seconds for blocking operations like the connection attempt (if not specified, the global default timeout - setting will be used). + setting will be used). The optional source_address parameter allows to bind to some + specific source address in a machine with multiple network interfaces, + and/or to some specific source TCP port. It takes a 2-tuple (host, port), + for the socket to bind to as its source address before connecting. If + omitted (or if host or port are ``''`` and/or 0 respectively) the OS default + behavior will be used. For normal use, you should only require the initialization/connect, :meth:`sendmail`, and :meth:`quit` methods. An example is included below. + The :class:`SMTP` class supports the :keyword:`with` statement. When used + like this, the SMTP ``QUIT`` command is issued automatically when the + :keyword:`with` statement exits. E.g.:: -.. class:: SMTP_SSL(host='', port=0, local_hostname=None, keyfile=None, certfile=None[, timeout]) + >>> from smtplib import SMTP + >>> with SMTP("domain.org") as smtp: + ... smtp.noop() + ... + (250, b'Ok') + >>> + + .. versionchanged:: 3.3 + Support for the :keyword:`with` statement was added. + + .. versionchanged:: 3.3 + source_address argument was added. + +.. class:: SMTP_SSL(host='', port=0, local_hostname=None, keyfile=None, certfile=None[, timeout], context=None, source_address=None) A :class:`SMTP_SSL` instance behaves exactly the same as instances of :class:`SMTP`. :class:`SMTP_SSL` should be used for situations where SSL is @@ -43,18 +64,33 @@ Protocol) and :rfc:`1869` (SMTP Service Extensions). not appropriate. If *host* is not specified, the local host is used. If *port* is zero, the standard SMTP-over-SSL port (465) is used. *keyfile* and *certfile* are also optional, and can contain a PEM formatted private key - and certificate chain file for the SSL connection. The optional *timeout* + and certificate chain file for the SSL connection. *context* also optional, can contain + a SSLContext, and is an alternative to keyfile and certfile; If it is specified both + keyfile and certfile must be None. The optional *timeout* parameter specifies a timeout in seconds for blocking operations like the connection attempt (if not specified, the global default timeout setting - will be used). + will be used). The optional source_address parameter allows to bind to some + specific source address in a machine with multiple network interfaces, + and/or to some specific source tcp port. It takes a 2-tuple (host, port), + for the socket to bind to as its source address before connecting. If + omitted (or if host or port are ``''`` and/or 0 respectively) the OS default + behavior will be used. + + .. versionchanged:: 3.3 + *context* was added. + .. versionchanged:: 3.3 + source_address argument was added. -.. class:: LMTP(host='', port=LMTP_PORT, local_hostname=None) + +.. class:: LMTP(host='', port=LMTP_PORT, local_hostname=None, source_address=None) The LMTP protocol, which is very similar to ESMTP, is heavily based on the - standard SMTP client. It's common to use Unix sockets for LMTP, so our :meth:`connect` - method must support that as well as a regular host:port server. To specify a - Unix socket, you must use an absolute path for *host*, starting with a '/'. + standard SMTP client. It's common to use Unix sockets for LMTP, so our + :meth:`connect` method must support that as well as a regular host:port + server. The optional arguments local_hostname and source_address have the + same meaning as that of SMTP client. To specify a Unix socket, you must use + an absolute path for *host*, starting with a '/'. Authentication is supported, using the regular SMTP mechanism. When using a Unix socket, LMTP generally don't support or require any authentication, but your @@ -242,7 +278,7 @@ An :class:`SMTP` instance has the following methods: No suitable authentication method was found. -.. method:: SMTP.starttls(keyfile=None, certfile=None) +.. method:: SMTP.starttls(keyfile=None, certfile=None, context=None) Put the SMTP connection in TLS (Transport Layer Security) mode. All SMTP commands that follow will be encrypted. You should then call :meth:`ehlo` @@ -251,6 +287,9 @@ An :class:`SMTP` instance has the following methods: If *keyfile* and *certfile* are provided, these are passed to the :mod:`socket` module's :func:`ssl` function. + Optional *context* parameter is a :class:`ssl.SSLContext` object; This is an alternative to + using a keyfile and a certfile and if specified both *keyfile* and *certfile* should be None. + If there has been no previous ``EHLO`` or ``HELO`` command this session, this method tries ESMTP ``EHLO`` first. @@ -263,6 +302,9 @@ An :class:`SMTP` instance has the following methods: :exc:`RuntimeError` SSL/TLS support is not available to your Python interpreter. + .. versionchanged:: 3.3 + *context* was added. + .. method:: SMTP.sendmail(from_addr, to_addrs, msg, mail_options=[], rcpt_options=[]) @@ -320,7 +362,8 @@ An :class:`SMTP` instance has the following methods: Unless otherwise noted, the connection will be open even after an exception is raised. - .. versionchanged:: 3.2 *msg* may be a byte string. + .. versionchanged:: 3.2 + *msg* may be a byte string. .. method:: SMTP.send_message(msg, from_addr=None, to_addrs=None, \ |