#18179: document the local_hostname parameter.
Original patch by Berker Peksag.
diff --git a/Doc/library/smtplib.rst b/Doc/library/smtplib.rst
index 9593dea..9f67028 100644
--- a/Doc/library/smtplib.rst
+++ b/Doc/library/smtplib.rst
@@ -25,7 +25,10 @@
A :class:`SMTP` instance encapsulates an SMTP connection. It has methods
that support a full repertoire of SMTP and ESMTP operations. If the optional
host and port parameters are given, the SMTP :meth:`connect` method is called
- with those parameters during initialization. If the :meth:`connect` call
+ with those parameters during initialization. If specified, *local_hostname* is
+ used as the FQDN of the local host in the HELO/EHLO command. Otherwise, the
+ local hostname is found using :func:`socket.getfqdn`. If the
+ :meth:`connect` call
returns anything other than a success code, an :exc:`SMTPConnectError` is
raised. The optional *timeout* parameter specifies a timeout in seconds for
blocking operations like the connection attempt (if not specified, the
@@ -57,13 +60,17 @@
.. 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)
+.. 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
required from the beginning of the connection and using :meth:`starttls` is
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*
+ *port* is zero, the standard SMTP-over-SSL port (465) is used. The optional
+ arguments *local_hostname* and *source_address* have the same meaning as
+ they do in the :class:`SMTP` class. *keyfile*
and *certfile* are also optional, and can contain a PEM formatted private key
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
@@ -90,7 +97,7 @@
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
+ same meaning as they do in the :class:`SMTP` class. 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
diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index f2c8452..4de846e 100644
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -224,7 +224,8 @@
By default, smtplib.SMTP_PORT is used. If a host is specified the
connect method is called, and if it returns anything other than
a success code an SMTPConnectError is raised. If specified,
- `local_hostname` is used as the FQDN of the local host. By default,
+ `local_hostname` is used as the FQDN of the local host in the
+ HELO/EHLO command. Otherwise,
the local hostname is found using socket.getfqdn(). The
`source_address` parameter takes a 2-tuple (host, port) for the socket
to bind to as its source address before connecting. If the host is ''
@@ -855,8 +856,8 @@
""" This is a subclass derived from SMTP that connects over an SSL encrypted
socket (to use this class you need a socket module that was compiled with SSL
support). If host is not specified, '' (the local host) is used. If port is
- omitted, the standard SMTP-over-SSL port (465) is used. The optional
- source_address takes a two-tuple (host,port) for socket to bind to. keyfile and certfile
+ omitted, the standard SMTP-over-SSL port (465) is used. local_hostname and
+ source_address have the same meaning as they do in the SMTP class. keyfile and certfile
are also optional - they can contain a PEM formatted private key 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
@@ -905,7 +906,9 @@
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 connect() method must support that as well as a regular
- host:port server. To specify a Unix socket, you must use an absolute
+ host:port server. local_hostname and source_address have the same
+ meaning as they do in the SMTP class.
+ To specify a Unix socket, you must use an absolute
path as the host, starting with a '/'.
Authentication is supported, using the regular SMTP mechanism. When