Version 4.0.0

Issue Tracker

Added

• New slimta.util functions for limiting outbound connections to IPv4.
• New socket_error_log_level variable for better log level control.

Changed

• Constructors and functions that took a tls dictionary now take a context
  argument that should be an SSLContext object. This allows finer
  control of encryption behavior, as well as the ability to pre-load sensitive
  certificate data before daemonization.
• Client connections will now be opportunistic and try to use TLS if it is
  available, even if a key or cert have not been configured.
• The AUTH SMTP extension will now advertise insecure authentication
  mechanisms without TLS, but trying to use them will fail.
• Moved the slimta.system module to slimta.util.system to de-clutter the
  top-level namespace.

Fixed

• Fixed a possible race condition on enqueue.
• Fixed exception when given empty EHLO/HELO string.
• Fixed the fallback from EHLO to HELO in certain situations.
• The session.auth variable now correctly contains the tuple described
  in the documentation.

Version 3.2.0

Issue Tracker

Added

• The parseline function is now exposed and documented.
• The slimta.logging.log_exception function may now be replaced with custom
  functions, for special error handling scenarios.

Changed

• Unit tests are now run with py.test instead of nosetests.
• Exception log lines will now include up to 10,000 characters of the traceback
  string.
• Socket errors are no longer logged as unhandled errors and do not include a
  traceback.
• socket.gaierror failures are now caught and ignored during PTR lookup.

Fixed

• Correctly set an empty greenlet pool in EdgeServer constructor.
• Corrected a potential duplicate relay scenario in Queue.
• Reply encoding and decoding now works correctly in Python 2.x.
• Fixed httplib imports in Python 3.3.

Version 3.1.0

Issue Tracker

Added

• QueueError objects may now set the reply attribute to tell edge services
  what happened.
• SMTP servers now advertize SMTPUTF8 and clients will now use UTF-8 sender
  and recipient addresses when connected to servers that advertize it.
• When creating an edge or relay service, now checks for the existence of any
  given TLS key or cert files before proceeding.
• Support for proxy protocol version 2 and version auto-detection.

Removed

• Dependence on six for Python 2/3 compatibility.

Changed

• The builtin edges now use 451 codes when a QueueError occurs, rather than
  550.
• The Bounce class header and footer templates may now be bytestrings.
• Envelope.flatten now returns bytestrings on Python 3, to avoid unnecessary
  encoding and decoding of message data.

Fixed

• Correctly throws PermanentRelayError instead of ZeroDivisionError for
  SMTP MX relays when DNS returns no results.

Version 3.0.0

Issue Tracker

Added

• Compatibility with Python 3.3+.
• Proxy protocol version 1 support on edge services.
• Dependence on pycares for DNS resolution.
• Support for the socket_creator option to control how sockets are created
  during SMTP relaying.
• Support for ehlo_as functions to allow custom EHLO logic on each delivery
  attempt.
• Support for a new handle_queued callback on SMTP edges, to control the reply
  code and message based on queue results.

Removed

• Compatibility with Python 2.6.x.
• Dependence on dnspython for DNS resolution.

Changed

• Relay results that were returned as a list are now returned as a dict, keyed
  on the envelope recipients.

Fixed

• During SMTP relaying, timeouts and other errors will more consistently return
  the current SMTP command where the error happened.
• Setting a reply code to 221 or 421 in an SMTP edge session will now result
  in the connection closing.