Package org.springframework.mail.javamail

Class JavaMailSenderImpl

java.lang.Object

org.springframework.mail.javamail.JavaMailSenderImpl

All Implemented Interfaces:

JavaMailSender, MailSender

public class JavaMailSenderImpl
extends Object
implements JavaMailSender

Production implementation of the JavaMailSender interface, supporting both JavaMail MimeMessages and Spring SimpleMailMessages. Can also be used as a plain MailSender implementation.

Allows for defining all settings locally as bean properties. Alternatively, a pre-configured JavaMail Session can be specified, possibly pulled from an application server's JNDI environment.

Non-default properties in this object will always override the settings in the JavaMail Session. Note that if overriding all values locally, there is no added value in setting a pre-configured Session.

Since:

10.09.2003

Author:

Dmitriy Kopylenko, Juergen Hoeller

See Also:

• MimeMessage
• Session
• setSession(jakarta.mail.Session)
• setJavaMailProperties(java.util.Properties)
• setHost(java.lang.String)
• setPort(int)
• setUsername(java.lang.String)
• setPassword(java.lang.String)

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_PORT	The default port: -1.
static final String	DEFAULT_PROTOCOL	The default protocol: 'smtp'.

Constructor Summary

Constructors

Constructor	Description
JavaMailSenderImpl()	Create a new instance of the JavaMailSenderImpl class.

Method Summary

Modifier and Type	Method	Description
protected Transport	connectTransport()	Obtain and connect a Transport from the underlying JavaMail Session, passing in the specified host, port, username, and password.
MimeMessage	createMimeMessage()	This implementation creates a SmartMimeMessage, holding the specified default encoding and default FileTypeMap.
MimeMessage	createMimeMessage(InputStream contentStream)	Create a new JavaMail MimeMessage for the underlying JavaMail Session of this sender, using the given input stream as the message source.
protected void	doSend(MimeMessage[] mimeMessages, Object[] originalMessages)	Actually send the given array of MimeMessages via JavaMail.
String	getDefaultEncoding()	Return the default encoding for MimeMessages, or null if none.
FileTypeMap	getDefaultFileTypeMap()	Return the default Java Activation FileTypeMap for MimeMessages, or null if none.
String	getHost()	Return the mail server host.
Properties	getJavaMailProperties()	Allow Map access to the JavaMail properties of this sender, with the option to add or override specific entries.
String	getPassword()	Return the password for the account at the mail host.
int	getPort()	Return the mail server port.
String	getProtocol()	Return the mail protocol.
Session	getSession()	Return the JavaMail Session, lazily initializing it if it hasn't been specified explicitly.
protected Transport	getTransport(Session session)	Obtain a Transport object from the given JavaMail Session, using the configured protocol.
String	getUsername()	Return the username for the account at the mail host.
void	send(MimeMessage... mimeMessages)	Send the given array of JavaMail MIME messages in batch.
void	send(SimpleMailMessage... simpleMessages)	Send the given array of simple mail messages in batch.
void	setDefaultEncoding(String defaultEncoding)	Set the default encoding to use for MimeMessages created by this instance.
void	setDefaultFileTypeMap(FileTypeMap defaultFileTypeMap)	Set the default Java Activation FileTypeMap to use for MimeMessages created by this instance.
void	setHost(String host)	Set the mail server host, typically an SMTP host.
void	setJavaMailProperties(Properties javaMailProperties)	Set JavaMail properties for the Session.
void	setPassword(String password)	Set the password for the account at the mail host, if any.
void	setPort(int port)	Set the mail server port.
void	setProtocol(String protocol)	Set the mail protocol.
void	setSession(Session session)	Set the JavaMail Session, possibly pulled from JNDI.
void	setUsername(String username)	Set the username for the account at the mail host, if any.
void	testConnection()	Validate that this instance can connect to the server that it is configured for.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.mail.javamail.JavaMailSender

send, send, send

Methods inherited from interface org.springframework.mail.MailSender

send

Field Details

DEFAULT_PROTOCOL

public static final String DEFAULT_PROTOCOL

The default protocol: 'smtp'.

See Also:

• Constant Field Values

DEFAULT_PORT

public static final int DEFAULT_PORT

The default port: -1.

See Also:

• Constant Field Values

Constructor Details

JavaMailSenderImpl

public JavaMailSenderImpl()

Create a new instance of the JavaMailSenderImpl class.

Initializes the "defaultFileTypeMap" property with a default ConfigurableMimeFileTypeMap.

Method Details

setJavaMailProperties

public void setJavaMailProperties(Properties javaMailProperties)

Set JavaMail properties for the Session.

A new Session will be created with those properties. Use either this method or setSession(jakarta.mail.Session), but not both.

Non-default properties in this instance will override given JavaMail properties.

getJavaMailProperties

public Properties getJavaMailProperties()

Allow Map access to the JavaMail properties of this sender, with the option to add or override specific entries.

Useful for specifying entries directly, for example via javaMailProperties[mail.smtp.auth].

setSession

public void setSession(Session session)

Set the JavaMail Session, possibly pulled from JNDI.

Default is a new Session without defaults, that is completely configured via this instance's properties.

If using a pre-configured Session, non-default properties in this instance will override the settings in the Session.

See Also:

• setJavaMailProperties(java.util.Properties)

getSession

public Session getSession()

Return the JavaMail Session, lazily initializing it if it hasn't been specified explicitly.

setProtocol

public void setProtocol(@Nullable
 String protocol)

Set the mail protocol. Default is "smtp".

getProtocol

@Nullable
public String getProtocol()

Return the mail protocol.

setHost

public void setHost(@Nullable
 String host)

Set the mail server host, typically an SMTP host.

Default is the default host of the underlying JavaMail Session.

getHost

@Nullable
public String getHost()

Return the mail server host.

setPort

public void setPort(int port)

Set the mail server port.

Default is DEFAULT_PORT, letting JavaMail use the default SMTP port (25).

getPort

public int getPort()

Return the mail server port.

setUsername

public void setUsername(@Nullable
 String username)

Set the username for the account at the mail host, if any.

Note that the underlying JavaMail Session has to be configured with the property "mail.smtp.auth" set to true, else the specified username will not be sent to the mail server by the JavaMail runtime. If you are not explicitly passing in a Session to use, simply specify this setting via setJavaMailProperties(java.util.Properties).

See Also:

• setSession(jakarta.mail.Session)
• setPassword(java.lang.String)

getUsername

@Nullable
public String getUsername()

Return the username for the account at the mail host.

setPassword

public void setPassword(@Nullable
 String password)

Set the password for the account at the mail host, if any.

Note that the underlying JavaMail Session has to be configured with the property "mail.smtp.auth" set to true, else the specified password will not be sent to the mail server by the JavaMail runtime. If you are not explicitly passing in a Session to use, simply specify this setting via setJavaMailProperties(java.util.Properties).

See Also:

• setSession(jakarta.mail.Session)
• setUsername(java.lang.String)

getPassword

@Nullable
public String getPassword()

Return the password for the account at the mail host.

setDefaultEncoding

public void setDefaultEncoding(@Nullable
 String defaultEncoding)

Set the default encoding to use for MimeMessages created by this instance.

Such an encoding will be auto-detected by MimeMessageHelper.

getDefaultEncoding

@Nullable
public String getDefaultEncoding()

Return the default encoding for MimeMessages, or null if none.

setDefaultFileTypeMap

public void setDefaultFileTypeMap(@Nullable
 FileTypeMap defaultFileTypeMap)

Set the default Java Activation FileTypeMap to use for MimeMessages created by this instance.

A FileTypeMap specified here will be autodetected by MimeMessageHelper, avoiding the need to specify the FileTypeMap for each MimeMessageHelper instance.

For example, you can specify a custom instance of Spring's ConfigurableMimeFileTypeMap here. If not explicitly specified, a default ConfigurableMimeFileTypeMap will be used, containing an extended set of MIME type mappings (as defined by the mime.types file contained in the Spring jar).

See Also:

• MimeMessageHelper.setFileTypeMap(jakarta.activation.FileTypeMap)

getDefaultFileTypeMap

@Nullable
public FileTypeMap getDefaultFileTypeMap()

Return the default Java Activation FileTypeMap for MimeMessages, or null if none.

send

public void send(SimpleMailMessage... simpleMessages)
          throws MailException

Description copied from interface: MailSender

Send the given array of simple mail messages in batch.

Specified by:

send in interface MailSender

Parameters:

simpleMessages - the messages to send

Throws:

MailParseException - in case of failure when parsing a message

MailAuthenticationException - in case of authentication failure

MailSendException - in case of failure when sending a message

MailException

createMimeMessage

public MimeMessage createMimeMessage()

This implementation creates a SmartMimeMessage, holding the specified default encoding and default FileTypeMap. This special defaults-carrying message will be autodetected by MimeMessageHelper, which will use the carried encoding and FileTypeMap unless explicitly overridden.

Specified by:

createMimeMessage in interface JavaMailSender

Returns:

the new MimeMessage instance

See Also:

• setDefaultEncoding(java.lang.String)
• setDefaultFileTypeMap(jakarta.activation.FileTypeMap)

createMimeMessage

public MimeMessage createMimeMessage(InputStream contentStream)
                              throws MailException

Description copied from interface: JavaMailSender

Create a new JavaMail MimeMessage for the underlying JavaMail Session of this sender, using the given input stream as the message source.

Specified by:

createMimeMessage in interface JavaMailSender

Parameters:

contentStream - the raw MIME input stream for the message

Returns:

the new MimeMessage instance

Throws:

MailParseException - in case of message creation failure

MailException

send

public void send(MimeMessage... mimeMessages)
          throws MailException

Description copied from interface: JavaMailSender

Send the given array of JavaMail MIME messages in batch. The messages need to have been created with JavaMailSender.createMimeMessage().

Specified by:

send in interface JavaMailSender

Parameters:

mimeMessages - messages to send

Throws:

MailAuthenticationException - in case of authentication failure

MailSendException - in case of failure when sending a message

MailException

See Also:

• JavaMailSender.createMimeMessage()

testConnection

public void testConnection()
                    throws MessagingException

Validate that this instance can connect to the server that it is configured for. Throws a MessagingException if the connection attempt failed.

Throws:

MessagingException

doSend

protected void doSend(MimeMessage[] mimeMessages,
 @Nullable
 Object[] originalMessages)
               throws MailException

Actually send the given array of MimeMessages via JavaMail.

Parameters:

mimeMessages - the MimeMessage objects to send

originalMessages - corresponding original message objects that the MimeMessages have been created from (with same array length and indices as the "mimeMessages" array), if any

Throws:

MailAuthenticationException - in case of authentication failure

MailSendException - in case of failure when sending a message

MailException

connectTransport

protected Transport connectTransport()
                              throws MessagingException

Obtain and connect a Transport from the underlying JavaMail Session, passing in the specified host, port, username, and password.

Returns:

the connected Transport object

Throws:

MessagingException - if the connect attempt failed

Since:

4.1.2

See Also:

• getTransport(jakarta.mail.Session)
• getHost()
• getPort()
• getUsername()
• getPassword()

getTransport

protected Transport getTransport(Session session)
                          throws NoSuchProviderException

Obtain a Transport object from the given JavaMail Session, using the configured protocol.

Can be overridden in subclasses, e.g. to return a mock Transport object.

Throws:

NoSuchProviderException

See Also:

• Session.getTransport(String)
• getSession()
• getProtocol()