Chapter 218. Mail Component

host

Required The mail server host name

String

port

The port number of the mail server

int

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

closeFolder (consumer)

Whether the consumer should close the folder after polling. Setting this option to false and having disconnect=false as well, then the consumer keep the folder open between polls.

true

boolean

copyTo (consumer)

After processing a mail message, it can be copied to a mail folder with the given name. You can override this configuration value, with a header with the key copyTo, allowing you to copy messages to folder names configured at runtime.

String

delete (consumer)

Deletes the messages after they have been processed. This is done by setting the DELETED flag on the mail message. If false, the SEEN flag is set instead. As of Camel 2.10 you can override this configuration option by setting a header with the key delete to determine if the mail should be deleted or not.

false

boolean

disconnect (consumer)

Whether the consumer should disconnect after polling. If enabled this forces Camel to connect on each poll.

false

boolean

handleFailedMessage (consumer)

If the mail consumer cannot retrieve a given mail message, then this option allows to handle the caused exception by the consumer’s error handler. By enable the bridge error handler on the consumer, then the Camel routing error handler can handle the exception instead. The default behavior would be the consumer throws an exception and no mails from the batch would be able to be routed by Camel.

false

boolean

maxMessagesPerPoll (consumer)

Specifies the maximum number of messages to gather per poll. By default, no maximum is set. Can be used to set a limit of e.g. 1000 to avoid downloading thousands of files when the server starts up. Set a value of 0 or negative to disable this option.

int

mimeDecodeHeaders (consumer)

This option enables transparent MIME decoding and unfolding for mail headers.

false

boolean

peek (consumer)

Will mark the javax.mail.Message as peeked before processing the mail message. This applies to IMAPMessage messages types only. By using peek the mail will not be eager marked as SEEN on the mail server, which allows us to rollback the mail message if there is an error processing in Camel.

true

boolean

sendEmptyMessageWhenIdle (consumer)

If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead.

false

boolean

skipFailedMessage (consumer)

If the mail consumer cannot retrieve a given mail message, then this option allows to skip the message and move on to retrieve the next mail message. The default behavior would be the consumer throws an exception and no mails from the batch would be able to be routed by Camel.

false

boolean

unseen (consumer)

Whether to limit by unseen mails only.

true

boolean

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

fetchSize (consumer)

Sets the maximum number of messages to consume during a poll. This can be used to avoid overloading a mail server, if a mailbox folder contains a lot of messages. Default value of -1 means no fetch size and all messages will be consumed. Setting the value to 0 is a special corner case, where Camel will not consume any messages at all.

-1

int

folderName (consumer)

The folder to poll.

INBOX

String

mailUidGenerator (consumer)

A pluggable MailUidGenerator that allows to use custom logic to generate UUID of the mail message.

MailUidGenerator

mapMailMessage (consumer)

Specifies whether Camel should map the received mail message to Camel body/headers. If set to true, the body of the mail message is mapped to the body of the Camel IN message and the mail headers are mapped to IN headers. If this option is set to false then the IN message contains a raw javax.mail.Message. You can retrieve this raw message by calling exchange.getIn().getBody(javax.mail.Message.class).

true

boolean

pollStrategy (consumer)

A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.

PollingConsumerPoll Strategy

postProcessAction (consumer)

Refers to an MailBoxPostProcessAction for doing post processing tasks on the mailbox once the normal processing ended.

MailBoxPostProcess Action

bcc (producer)

Sets the BCC email address. Separate multiple email addresses with comma.

String

cc (producer)

Sets the CC email address. Separate multiple email addresses with comma.

String

from (producer)

The from email address

camel@localhost

String

replyTo (producer)

The Reply-To recipients (the receivers of the response mail). Separate multiple email addresses with a comma.

String

subject (producer)

The Subject of the message being sent. Note: Setting the subject in the header takes precedence over this option.

String

to (producer)

Sets the To email address. Separate multiple email addresses with comma.

String

javaMailSender (producer)

To use a custom org.apache.camel.component.mail.JavaMailSender for sending emails.

JavaMailSender

additionalJavaMail Properties (advanced)

Sets additional java mail properties, that will append/override any default properties that is set based on all the other options. This is useful if you need to add some special options but want to keep the others as is.

Properties

alternativeBodyHeader (advanced)

Specifies the key to an IN message header that contains an alternative email body. For example, if you send emails in text/html format and want to provide an alternative mail body for non-HTML email clients, set the alternative mail body with this key as a header.

CamelMailAlternativeBody

String

attachmentsContentTransfer EncodingResolver (advanced)

To use a custom AttachmentsContentTransferEncodingResolver to resolve what content-type-encoding to use for attachments.

AttachmentsContent TransferEncoding Resolver

binding (advanced)

Sets the binding used to convert from a Camel message to and from a Mail message

MailBinding

connectionTimeout (advanced)

The connection timeout in milliseconds.

30000

int

contentType (advanced)

The mail message content type. Use text/html for HTML mails.

text/plain

String

contentTypeResolver (advanced)

Resolver to determine Content-Type for file attachments.

ContentTypeResolver

debugMode (advanced)

Enable debug mode on the underlying mail framework. The SUN Mail framework logs the debug messages to System.out by default.

false

boolean

headerFilterStrategy (advanced)

To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter headers.

HeaderFilterStrategy

ignoreUnsupportedCharset (advanced)

Option to let Camel ignore unsupported charset in the local JVM when sending mails. If the charset is unsupported then charset=XXX (where XXX represents the unsupported charset) is removed from the content-type and it relies on the platform default instead.

false

boolean

ignoreUriScheme (advanced)

Option to let Camel ignore unsupported charset in the local JVM when sending mails. If the charset is unsupported then charset=XXX (where XXX represents the unsupported charset) is removed from the content-type and it relies on the platform default instead.

false

boolean

session (advanced)

Specifies the mail session that camel should use for all mail interactions. Useful in scenarios where mail sessions are created and managed by some other resource, such as a JavaEE container. If this is not specified, Camel automatically creates the mail session for you.

Session

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

useInlineAttachments (advanced)

Whether to use disposition inline or attachment.

false

boolean

idempotentRepository (filter)

A pluggable repository org.apache.camel.spi.IdempotentRepository which allows to cluster consuming from the same mailbox, and let the repository coordinate whether a mail message is valid for the consumer to process. By default no repository is in use.

IdempotentRepository

idempotentRepositoryRemove OnCommit (filter)

When using idempotent repository, then when the mail message has been successfully processed and is committed, should the message id be removed from the idempotent repository (default) or be kept in the repository. By default its assumed the message id is unique and has no value to be kept in the repository, because the mail message will be marked as seen/moved or deleted to prevent it from being consumed again. And therefore having the message id stored in the idempotent repository has little value. However this option allows to store the message id, for whatever reason you may have.

true

boolean

searchTerm (filter)

Refers to a javax.mail.search.SearchTerm which allows to filter mails based on search criteria such as subject, body, from, sent after a certain date etc.

SearchTerm

backoffErrorThreshold (scheduler)

The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.

int

backoffIdleThreshold (scheduler)

The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

int

backoffMultiplier (scheduler)

To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

int

delay (scheduler)

Milliseconds before the next poll.

60000

long

greedy (scheduler)

If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages.

false

boolean

initialDelay (scheduler)

Milliseconds before the first poll starts. You can also specify time values using units, such as 60s (60 seconds), 5m30s (5 minutes and 30 seconds), and 1h (1 hour).

1000

long

runLoggingLevel (scheduler)

The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

TRACE

LoggingLevel

scheduledExecutorService (scheduler)

Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool.

ScheduledExecutor Service

scheduler (scheduler)

To use a cron scheduler from either camel-spring or camel-quartz2 component

none

ScheduledPollConsumer Scheduler

schedulerProperties (scheduler)

To configure additional properties when using a custom scheduler or any of the Quartz2, Spring based scheduler.

Map

startScheduler (scheduler)

Whether the scheduler should be auto started.

true

boolean

timeUnit (scheduler)

Time unit for initialDelay and delay options.

MILLISECONDS

TimeUnit

useFixedDelay (scheduler)

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details.

true

boolean

sortTerm (sort)

Sorting order for messages. Only natively supported for IMAP. Emulated to some degree when using POP3 or when IMAP server does not have the SORT capability.

String

dummyTrustManager (security)

To use a dummy security setting for trusting all certificates. Should only be used for development mode, and not production.

false

boolean

password (security)

The password for login

String

sslContextParameters (security)

To configure security using SSLContextParameters.

SSLContextParameters

username (security)

The username for login

String