.. module:: imaplib :synopsis: IMAP4 protocol client (requires sockets).
.. moduleauthor:: Piers Lauder <piers@communitysolutions.com.au>
.. sectionauthor:: Piers Lauder <piers@communitysolutions.com.au>
Source code: :source:`Lib/imaplib.py`
.. index:: pair: IMAP4; protocol pair: IMAP4_SSL; protocol pair: IMAP4_stream; protocol
This module defines three classes, :class:`IMAP4`, :class:`IMAP4_SSL` and
:class:`IMAP4_stream`, which encapsulate a connection to an IMAP4 server and
implement a large subset of the IMAP4rev1 client protocol as defined in
RFC 1730) servers, but
note that the STATUS command is not supported in IMAP4.
Three classes are provided by the :mod:`imaplib` module, :class:`IMAP4` is the base class:
This class implements the actual IMAP4 protocol. The connection is created and
protocol version (IMAP4 or IMAP4rev1) is determined when the instance is
initialized. If host is not specified, '' (the local host) is used. If
port is omitted, the standard IMAP4 port (143) is used.
The :class:`IMAP4` class supports the :keyword:`with` statement. When used
like this, the IMAP4 LOGOUT command is issued automatically when the
:keyword:`!with` statement exits. E.g.:
>>> from imaplib import IMAP4
>>> with IMAP4("domain.org") as M:
... M.noop()
...
('OK', [b'Nothing Accomplished. d25if65hy903weo.87'])
.. versionchanged:: 3.5 Support for the :keyword:`with` statement was added.
Three exceptions are defined as attributes of the :class:`IMAP4` class:
.. exception:: IMAP4.error Exception raised on any errors. The reason for the exception is passed to the constructor as a string.
.. exception:: IMAP4.abort IMAP4 server errors cause this exception to be raised. This is a sub-class of :exc:`IMAP4.error`. Note that closing the instance and instantiating a new one will usually allow recovery from this exception.
.. exception:: IMAP4.readonly This exception is raised when a writable mailbox has its status changed by the server. This is a sub-class of :exc:`IMAP4.error`. Some other client now has write permission, and the mailbox will need to be re-opened to re-obtain write permission.
There's also a subclass for secure connections:
The second subclass allows for connections created by a child process:
This is a subclass derived from :class:`IMAP4` that connects to the
stdin/stdout file descriptors created by passing command to
subprocess.Popen().
The following utility functions are defined:
.. function:: Internaldate2tuple(datestr) Parse an IMAP4 ``INTERNALDATE`` string and return corresponding local time. The return value is a :class:`time.struct_time` tuple or ``None`` if the string has wrong format.
.. function:: Int2AP(num) Converts an integer into a string representation using characters from the set [``A`` .. ``P``].
.. function:: ParseFlags(flagstr) Converts an IMAP4 ``FLAGS`` response to a tuple of individual flags.
.. function:: Time2Internaldate(date_time) Convert *date_time* to an IMAP4 ``INTERNALDATE`` representation. The return value is a string in the form: ``"DD-Mmm-YYYY HH:MM:SS +HHMM"`` (including double-quotes). The *date_time* argument can be a number (int or float) representing seconds since epoch (as returned by :func:`time.time`), a 9-tuple representing local time an instance of :class:`time.struct_time` (as returned by :func:`time.localtime`), an aware instance of :class:`datetime.datetime`, or a double-quoted string. In the last case, it is assumed to already be in the correct format.
Note that IMAP4 message numbers change as the mailbox changes; in particular,
after an EXPUNGE command performs deletions the remaining messages are
renumbered. So it is highly advisable to use UIDs instead, with the UID command.
At the end of the module, there is a test section that contains a more extensive example of usage.
.. seealso:: Documents describing the protocol, and sources and binaries for servers implementing it, can all be found at the University of Washington's *IMAP Information Center* (https://www.washington.edu/imap/).
All IMAP4rev1 commands are represented by methods of the same name, either upper-case or lower-case.
All arguments to commands are converted to strings, except for AUTHENTICATE,
and the last argument to APPEND which is passed as an IMAP4 literal. If
necessary (the string contains IMAP4 protocol-sensitive characters and isn't
enclosed with either parentheses or double quotes) each string is quoted.
However, the password argument to the LOGIN command is always quoted. If
you want to avoid having an argument string quoted (eg: the flags argument to
STORE) then enclose the string in parentheses (eg: r'(\Deleted)').
Each command returns a tuple: (type, [data, ...]) where type is usually
'OK' or 'NO', and data is either the text from the command response,
or mandated results from the command. Each data is either a string, or a
tuple. If a tuple, then the first part is the header of the response, and the
second part contains the data (ie: 'literal' value).
The message_set options to commands below is a string specifying one or more
messages to be acted upon. It may be a simple message number ('1'), a range
of message numbers ('2:4'), or a group of non-contiguous ranges separated by
commas ('1:3,6:9'). A range can contain an asterisk to indicate an infinite
upper bound ('3:*').
An :class:`IMAP4` instance has the following methods:
.. method:: IMAP4.append(mailbox, flags, date_time, message) Append *message* to named mailbox.
.. method:: IMAP4.authenticate(mechanism, authobject) Authenticate command --- requires response processing. *mechanism* specifies which authentication mechanism is to be used - it should appear in the instance variable ``capabilities`` in the form ``AUTH=mechanism``. *authobject* must be a callable object:: data = authobject(response) It will be called to process server continuation responses; the *response* argument it is passed will be ``bytes``. It should return ``bytes`` *data* that will be base64 encoded and sent to the server. It should return ``None`` if the client abort response ``*`` should be sent instead. .. versionchanged:: 3.5 string usernames and passwords are now encoded to ``utf-8`` instead of being limited to ASCII.
.. method:: IMAP4.check() Checkpoint mailbox on server.
.. method:: IMAP4.close() Close currently selected mailbox. Deleted messages are removed from writable mailbox. This is the recommended command before ``LOGOUT``.
.. method:: IMAP4.copy(message_set, new_mailbox) Copy *message_set* messages onto end of *new_mailbox*.
.. method:: IMAP4.create(mailbox) Create new mailbox named *mailbox*.
.. method:: IMAP4.delete(mailbox) Delete old mailbox named *mailbox*.
.. method:: IMAP4.deleteacl(mailbox, who) Delete the ACLs (remove any rights) set for who on mailbox.
.. method:: IMAP4.enable(capability) Enable *capability* (see :rfc:`5161`). Most capabilities do not need to be enabled. Currently only the ``UTF8=ACCEPT`` capability is supported (see :RFC:`6855`). .. versionadded:: 3.5 The :meth:`enable` method itself, and :RFC:`6855` support.
.. method:: IMAP4.expunge() Permanently remove deleted items from selected mailbox. Generates an ``EXPUNGE`` response for each deleted message. Returned data contains a list of ``EXPUNGE`` message numbers in order received.
.. method:: IMAP4.fetch(message_set, message_parts) Fetch (parts of) messages. *message_parts* should be a string of message part names enclosed within parentheses, eg: ``"(UID BODY[TEXT])"``. Returned data are tuples of message part envelope and data.
.. method:: IMAP4.getacl(mailbox) Get the ``ACL``\ s for *mailbox*. The method is non-standard, but is supported by the ``Cyrus`` server.
.. method:: IMAP4.getannotation(mailbox, entry, attribute) Retrieve the specified ``ANNOTATION``\ s for *mailbox*. The method is non-standard, but is supported by the ``Cyrus`` server.
.. method:: IMAP4.getquota(root) Get the ``quota`` *root*'s resource usage and limits. This method is part of the IMAP4 QUOTA extension defined in rfc2087.
.. method:: IMAP4.getquotaroot(mailbox) Get the list of ``quota`` ``roots`` for the named *mailbox*. This method is part of the IMAP4 QUOTA extension defined in rfc2087.
.. method:: IMAP4.list([directory[, pattern]]) List mailbox names in *directory* matching *pattern*. *directory* defaults to the top-level mail folder, and *pattern* defaults to match anything. Returned data contains a list of ``LIST`` responses.
.. method:: IMAP4.login(user, password) Identify the client using a plaintext password. The *password* will be quoted.
.. method:: IMAP4.login_cram_md5(user, password) Force use of ``CRAM-MD5`` authentication when identifying the client to protect the password. Will only work if the server ``CAPABILITY`` response includes the phrase ``AUTH=CRAM-MD5``.
.. method:: IMAP4.logout() Shutdown connection to server. Returns server ``BYE`` response.
.. method:: IMAP4.lsub(directory='""', pattern='*') List subscribed mailbox names in directory matching pattern. *directory* defaults to the top level directory and *pattern* defaults to match any mailbox. Returned data are tuples of message part envelope and data.
.. method:: IMAP4.myrights(mailbox) Show my ACLs for a mailbox (i.e. the rights that I have on mailbox).
.. method:: IMAP4.namespace() Returns IMAP namespaces as defined in :rfc:`2342`.
.. method:: IMAP4.noop() Send ``NOOP`` to server.
.. method:: IMAP4.open(host, port) Opens socket to *port* at *host*. This method is implicitly called by the :class:`IMAP4` constructor. The connection objects established by this method will be used in the :meth:`IMAP4.read`, :meth:`IMAP4.readline`, :meth:`IMAP4.send`, and :meth:`IMAP4.shutdown` methods. You may override this method.
.. method:: IMAP4.partial(message_num, message_part, start, length) Fetch truncated part of a message. Returned data is a tuple of message part envelope and data.
.. method:: IMAP4.proxyauth(user) Assume authentication as *user*. Allows an authorised administrator to proxy into any user's mailbox.
.. method:: IMAP4.read(size) Reads *size* bytes from the remote server. You may override this method.
.. method:: IMAP4.readline() Reads one line from the remote server. You may override this method.
.. method:: IMAP4.recent() Prompt server for an update. Returned data is ``None`` if no new messages, else value of ``RECENT`` response.
.. method:: IMAP4.rename(oldmailbox, newmailbox) Rename mailbox named *oldmailbox* to *newmailbox*.
.. method:: IMAP4.response(code) Return data for response *code* if received, or ``None``. Returns the given code, instead of the usual type.
.. method:: IMAP4.search(charset, criterion[, ...]) Search mailbox for matching messages. *charset* may be ``None``, in which case no ``CHARSET`` will be specified in the request to the server. The IMAP protocol requires that at least one criterion be specified; an exception will be raised when the server returns an error. *charset* must be ``None`` if the ``UTF8=ACCEPT`` capability was enabled using the :meth:`enable` command. Example:: # M is a connected IMAP4 instance... typ, msgnums = M.search(None, 'FROM', '"LDJ"') # or: typ, msgnums = M.search(None, '(FROM "LDJ")')
.. method:: IMAP4.select(mailbox='INBOX', readonly=False) Select a mailbox. Returned data is the count of messages in *mailbox* (``EXISTS`` response). The default *mailbox* is ``'INBOX'``. If the *readonly* flag is set, modifications to the mailbox are not allowed.
.. method:: IMAP4.send(data) Sends ``data`` to the remote server. You may override this method.
.. method:: IMAP4.setacl(mailbox, who, what) Set an ``ACL`` for *mailbox*. The method is non-standard, but is supported by the ``Cyrus`` server.
.. method:: IMAP4.setannotation(mailbox, entry, attribute[, ...]) Set ``ANNOTATION``\ s for *mailbox*. The method is non-standard, but is supported by the ``Cyrus`` server.
.. method:: IMAP4.setquota(root, limits) Set the ``quota`` *root*'s resource *limits*. This method is part of the IMAP4 QUOTA extension defined in rfc2087.
.. method:: IMAP4.shutdown() Close connection established in ``open``. This method is implicitly called by :meth:`IMAP4.logout`. You may override this method.
.. method:: IMAP4.socket() Returns socket instance used to connect to server.
.. method:: IMAP4.sort(sort_criteria, charset, search_criterion[, ...]) The ``sort`` command is a variant of ``search`` with sorting semantics for the results. Returned data contains a space separated list of matching message numbers. Sort has two arguments before the *search_criterion* argument(s); a parenthesized list of *sort_criteria*, and the searching *charset*. Note that unlike ``search``, the searching *charset* argument is mandatory. There is also a ``uid sort`` command which corresponds to ``sort`` the way that ``uid search`` corresponds to ``search``. The ``sort`` command first searches the mailbox for messages that match the given searching criteria using the charset argument for the interpretation of strings in the searching criteria. It then returns the numbers of matching messages. This is an ``IMAP4rev1`` extension command.
.. method:: IMAP4.starttls(ssl_context=None) Send a ``STARTTLS`` command. The *ssl_context* argument is optional and should be a :class:`ssl.SSLContext` object. This will enable encryption on the IMAP connection. Please read :ref:`ssl-security` for best practices. .. versionadded:: 3.2 .. versionchanged:: 3.4 The method now supports hostname check with :attr:`ssl.SSLContext.check_hostname` and *Server Name Indication* (see :data:`ssl.HAS_SNI`).
.. method:: IMAP4.status(mailbox, names) Request named status conditions for *mailbox*.
.. method:: IMAP4.store(message_set, command, flag_list) Alters flag dispositions for messages in mailbox. *command* is specified by section 6.4.6 of :rfc:`2060` as being one of "FLAGS", "+FLAGS", or "-FLAGS", optionally with a suffix of ".SILENT". For example, to set the delete flag on all messages:: typ, data = M.search(None, 'ALL') for num in data[0].split(): M.store(num, '+FLAGS', '\\Deleted') M.expunge() .. note:: Creating flags containing ']' (for example: "[test]") violates :rfc:`3501` (the IMAP protocol). However, imaplib has historically allowed creation of such tags, and popular IMAP servers, such as Gmail, accept and produce such flags. There are non-Python programs which also create such tags. Although it is an RFC violation and IMAP clients and servers are supposed to be strict, imaplib nonetheless continues to allow such tags to be created for backward compatibility reasons, and as of Python 3.6, handles them if they are sent from the server, since this improves real-world compatibility.
.. method:: IMAP4.subscribe(mailbox) Subscribe to new mailbox.
.. method:: IMAP4.thread(threading_algorithm, charset, search_criterion[, ...]) The ``thread`` command is a variant of ``search`` with threading semantics for the results. Returned data contains a space separated list of thread members. Thread members consist of zero or more messages numbers, delimited by spaces, indicating successive parent and child. Thread has two arguments before the *search_criterion* argument(s); a *threading_algorithm*, and the searching *charset*. Note that unlike ``search``, the searching *charset* argument is mandatory. There is also a ``uid thread`` command which corresponds to ``thread`` the way that ``uid search`` corresponds to ``search``. The ``thread`` command first searches the mailbox for messages that match the given searching criteria using the charset argument for the interpretation of strings in the searching criteria. It then returns the matching messages threaded according to the specified threading algorithm. This is an ``IMAP4rev1`` extension command.
.. method:: IMAP4.uid(command, arg[, ...]) Execute command args with messages identified by UID, rather than message number. Returns response appropriate to command. At least one argument must be supplied; if none are provided, the server will return an error and an exception will be raised.
.. method:: IMAP4.unsubscribe(mailbox) Unsubscribe from old mailbox.
.. method:: IMAP4.xatom(name[, ...]) Allow simple extension commands notified by server in ``CAPABILITY`` response.
The following attributes are defined on instances of :class:`IMAP4`:
.. attribute:: IMAP4.PROTOCOL_VERSION The most recent supported protocol in the ``CAPABILITY`` response from the server.
.. attribute:: IMAP4.debug Integer value to control debugging output. The initialize value is taken from the module variable ``Debug``. Values greater than three trace each command.
.. attribute:: IMAP4.utf8_enabled Boolean value that is normally ``False``, but is set to ``True`` if an :meth:`enable` command is successfully issued for the ``UTF8=ACCEPT`` capability. .. versionadded:: 3.5
Here is a minimal example (without error checking) that opens a mailbox and retrieves and prints all messages:
import getpass, imaplib
M = imaplib.IMAP4()
M.login(getpass.getuser(), getpass.getpass())
M.select()
typ, data = M.search(None, 'ALL')
for num in data[0].split():
typ, data = M.fetch(num, '(RFC822)')
print('Message %s\n%s\n' % (num, data[0][1]))
M.close()
M.logout()
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