All Classes and Interfaces

Class	Description
AbstractStorageProcessor	Abstract base class for storage processors.
AdaptiveRateConfig	Configuration for adaptive rate limiting.
AdaptiveRateLimiter	Applies adaptive rate limiting by reducing connection limits under high server load.
AnnotationLoader	Plugin annotation loader.
ApiEndpoint	API endpoint for case submission and queue management.
ApiEndpointUtils	Utility methods shared across API endpoint handlers.
ApiHandler	Interface for API endpoint handlers.
Assert	Assertion engine.
AssertConfig	Assertions container.
AssertException	Assertion exception.
AssertExternalGroup	Assert external group.
AuthVerb	AUTH verb.
AVStorageProcessor	Storage processor for antivirus scanning using ClamAV.
BadPolicyException	Policy Exception.
BadRecordException	Record Exception.
BasicConfig	Config generic implemetation.
BdatVerb	BDAT verb.
Behaviour	Client behaviour interface.
BlackholeConfig	Configuration class for blackhole settings.
BlackholeMatcher	Utility class for matching emails against blackhole rules.
BlocklistConfig	Configuration class for connection blocklist settings.
BlocklistMatcher	Utility class for efficiently matching IP addresses against a blocklist.
BotConfig	Bot configuration for email infrastructure analysis bots.
BotConfig.BotDefinition	Represents a single bot definition.
BotHelper	Utility class for common bot operations.
BotProcessor	Bot processor interface for email infrastructure analysis bots.
BotReplyAddressResolver	Utility class for resolving reply addresses in bot requests.
BounceGenerator	Bounce message generator.
BounceMessageGenerator	Bounce message generator.
CaseConfig	Client case configuration container.
ChaosHeaders	Chaos headers container for testing exception scenarios.
CharsetDetector	Charset detector.
ChunkedInputStream	Input stream with data chunking capabilities for SMTP CHUNKING extension.
ClamAVClient	ClamAV antivirus scanner client.
Client	Case delivery client with assertion.
ClientAuth	AUTH extension processor.
ClientCLI	Implementation of client CLI.
ClientConfig	Default client configuration container.
ClientData	DATA extension processor.
ClientEhlo	EHLO extension processor.
ClientHelp	HELP extension processor.
ClientMail	MAIL extension processor.
ClientProcessor	Client extension processor abstract.
ClientQueueHandler	Handler for the /client/queue endpoint.
ClientQuit	QUIT extension processor.
ClientRcpt	RCPT extension processor.
ClientRset	RSET extension processor.
ClientSendHandler	Handler for the /client/send endpoint.
ClientStartTls	STARTTLS extension processor with DANE and MTA-STS enforcement.
ClientXclient	XCLIENT extension processor.
Config	Master configuration initializer and container.
Config	Config.
ConfigFoundation	JSON config file loader and primitive getters provider.
ConfigHandler	Config handler abstract.
ConfigLoader	Static predefined config files loader (client, server, properties, log4j).
ConfigMapper	Mapper of CaseConfig to Session.
Connection	Connection controller.
ConnectionStore	Abstraction for connection state storage used by ConnectionTracker.
ConnectionStoreFactory	Factory for creating ConnectionStore implementations.
ConnectionTracker	Tracks connection state for DoS protection.
CustomBehaviour	Customisable client behaviour.
DaneChecker	DANE (DNS-Based Authentication of Named Entities) checker for SMTP.
DaneMain	DANE CLI tool for checking TLSA records.
DaneRecord	Represents a DANE TLSA record for SMTP.
DaneTrustManager	DANE-aware TrustManager for SMTP TLS certificate validation.
DefaultBehaviour	Default client behaviour.
DefaultTLSSocket	Standard TLS handshake negociation implementation.
DigestCache	Digest-MD5 authentication mechanism database.
DigestData	Digest data.
DigestMD5	Digest-MD5 authentication mechanism.
DigestMD5Client	Digest-MD5 authentication client implementation.
DigestMD5Server	Digest-MD5 authentication server implementation.
DigestUtils	Digest-MD5 utils.
DistributedRateConfig	Configuration for distributed rate limiting via Redis.
DkimSigner	DKIM signing backend interface.
DkimSigningLookup	DKIM signing lookup.
DnsRecord	DNS Record interface.
DnsRecordClient	Dns Record Client.
DovecotConfig	Typed Dovecot-specific configuration extending BasicConfig.
DovecotConfig.AuthSocket	Dovecot authentication socket configuration.
DovecotConfig.SaveLda	LDA backend configuration.
DovecotConfig.SaveLmtp	LMTP backend configuration.
DovecotLdaClient	Dovecot LDA client.
DovecotSaslAuthNative	DovecotSaslAuthNative is a UNIX domain socket client for authenticating users against a Dovecot SASL authentication service using native Java socket support.
DovecotStorageProcessor	DovecotStorageProcessor delivers emails to user mailboxes using either LDA or LMTP backends.
DovecotUserLookupNative	DovecotUserLookupNative is a UNIX domain socket client for performing user existence lookups against a Dovecot authentication user database (auth-userdb) service using native Java UNIX domain sockets.
EhloVerb	EHLO verb.
EmailAnalysisBot	Email infrastructure analysis bot that performs comprehensive email security checks.
EmailBuilder	EmailBuilder is a fluent MIME email message generator that constructs RFC 2822 compliant email messages with support for single-part and multipart structures.
EmailDelivery	Email delivery core.
EmailDirection	Email direction enum.
EmailParser	EmailParser is a standalone MIME email parser that extracts email headers, body content, and attachments from RFC 2822 formatted email messages.
EmailReceipt	Email receipt runnable.
EndpointConfig	Endpoint authentication configuration.
EnvelopeConfig	Case envelope configuration container.
EnvelopeTransactionList	EnvelopeTransactionList.
Extension	Extension container.
Extensions	Server and client SMTP extensions container.
ExternalClient	Abstract for external logs client.
ExternalConfig	External assertions config.
Factories	Factories for pluggable components.
FailingHttpsPolicyClient
FileMessageSource	File-backed envelope message source.
FileMimePart	MIME part container from file path.
Foundation	Run-once initializer for server and client.
GeoIpAction	The action to apply to a connection based on its originating country.
GeoIpConfig	Configuration class for GeoIP-based connection filtering.
GeoIpLookup	Performs country lookups using an offline MaxMind GeoLite2 database.
GeoIpMatcher	Determines the GeoIpAction for an incoming connection based on its country of origin.
GsonExclusionStrategy
HashType	Hash type container.
HeaderTag	Header tag container for tagging header values.
HeaderWrangler	MIME email header content injector.
HotSpotDiagnostic	HotSpotDiagnostic interface.
HttpAuth	HTTP Authentication utility for endpoint security.
HttpBasicAuth	HTTP Basic Authentication utility for endpoint security.
HttpClient	HTTP/S client.
HttpEndpoint	Abstract base class for HTTP endpoints serving both API and service monitoring capabilities.
HttpMethod	HTTP/S method.
HttpRequest	HTTP/S request container used across the project.
HttpResponse	HTTP/S response container.
HttpsPolicyClient	Https Policy Client.
HttpsResponse	HTTPS Response Interface.
HumioClient	Humio client.
HumioExternalClient	Humio external client.
HumioPlugin	Humio plugin.
ImapClient	Lightweight IMAP helper used by tests and utilities to fetch messages from a mailbox.
ImapClient.PartDescriptor	Descriptor for a MIME part containing headers, body content, and hashes.
ImapExternalClient	IMAP external client for email verification assertions.
InMemoryMessageSource	In-memory envelope message source.
InMemoryQueueDatabase<T>	In-memory scheduled work queue used in tests.
InMemoryQueueDatabase.IndexKey
InstanceDigestCache	Digest-MD5 authentication mechanism database.
IpPoolConfig	IP pool configuration.
IpPoolConfig.AddressEntry	A bind address with an associated selection weight.
IpPoolConfig.PoolEntry	An IP pool with a name, default flag, and address list.
IpPoolSelector	Weighted round-robin IP pool selector for outbound bind address selection.
LineInputStream	Line input stream.
LineInputStream	Input stream with binary line reading capability.
ListenerConfig	Listener configuration for SMTP ports.
LmtpBehaviour	LMTP-specific client behaviour for connection pooling.
LmtpConnectionPool	Connection pool for LMTP deliveries with actual connection reuse.
LmtpConnectionPool.PooledLmtpConnection	Wrapper for a pooled LMTP connection with lifecycle tracking.
LocalConnectionStore	In-process implementation of ConnectionStore.
LocalConnectionStore.IpConnectionState	Per-IP connection state tracking.
LocalDnsResolver	Local DNS Resolver.
LocalHttpsPolicyClient	Local Https Policy Client.
LocalHttpsResponse	Local HTTPS Response.
LocalHttpsServer	Local HTTPS Server.
LocalStorageClient	Local storage client implementation.
LocalStorageProcessor	Local storage processor for mailbox storage.
LoggingConfig	Configuration foundation.
Login	Login authentication mechanism.
LogsExternalClient	Logs external client.
LogsExternalClientConfig	Logs assertions config.
LogsHandler	Handler for searching log files.
LogsHandler.LogsSearchException	Exception thrown when log search operations fail.
Magic	Magic processors.
MagicInputStream	Input stream with magic variable replacement capability.
MailboxStore	Interface for mailbox storage operations.
MailboxStore.FolderProperties
MailboxStore.FolderSummary
MailboxStore.FolderView
MailboxStore.MailboxView
MailboxStore.MessageContent
MailboxStore.MessageSummary
MailVerb	MAIL verb.
Main	Main runnable.
MapDBQueueDatabase<T>	MapDB-backed scheduled work queue.
MapUtils	Map utils.
MatchExternalClient	Match external client.
MatchExternalClientConfig	Assertions config extension for matching calls.
MemoryPolicyCache	Memory policy cache.
MessageBufferOutputStream	Buffers message receipt in memory and spills to disk after a configured threshold.
MessageEnvelope	Message envelope.
MessageSource	Canonical message source abstraction for an envelope payload.
MetricsCron	Periodically collects Micrometer metrics and pushes them to a Prometheus-compatible backend using the Remote Write protocol (protobuf) with optional Snappy block compression.
MetricsCron.Label	POJO: name/value label pair.
MetricsCron.ProtoWriter	Tiny protobuf writer sufficient for the WriteRequest/TimeSeries/Label/Sample envelope.
MetricsCron.Sample	POJO: a single sample value with timestamp in millis.
MetricsCron.TimeSeries	POJO: one time series with its labels and samples.
MetricsRegistry	Global access to metric registries for background jobs like MetricsCron.
MimeConfig	Assertions container.
MimeHeader	MIME header container.
MimeHeaders	Mime headers container.
MimePart	MIME part container abstract.
MtaStsMain	CLI runnable.
MultipartMimePart	MIME part container from multiparts.
MXResolver	MXResolver encapsulates MX record resolution with DANE and MTA-STS support.
MXRoute	MXRoute groups domains that share the same ordered MX server list.
MXServer	Server entry for a route, keeping its host, priority and the domains using it.
NativeDkimSigner	DKIM signer using Apache jDKIM — no external service required.
NoRecordException	DNS Exception.
NotRandom	Digest-MD5 authentication mechanism returning predefined string instead of a random one.
OkHttpsPolicyClient	OK HTTPS Policy Client.
OkHttpsPolicyClient.UserAgentInterceptor	Transforms User-Agent header on the request.
OkHttpsResponse	OK HTTPS Response.
Pair	Pair key/value store.
PathUtils	Static utilities for handling files and paths.
PdfMimePart	MIME part container from pdf config.
PermissiveTrustManager	All trusting manager.
PersistentQueue<T>	Persistent queue facade for relay sessions and queue administration.
Plain	Plain authentication mechanism.
Plugin	Plugin annotation interface.
PolicyCache	Policy cache.
PolicyFetchErrorException	Policy fetch error exception.
PolicyWebPKIInvalidException	Policy web PKI invalid exception.
PooledLmtpDelivery	Shared LMTP delivery helper that reuses the server connection pool.
PooledLmtpDelivery.DeliveryAttemptResult
Properties	General purpose configuration.
ProxyBehaviour	Proxy client behaviour.
ProxyConfig	Configuration class for proxy settings.
ProxyEmailDelivery	Proxy email delivery class.
ProxyMatcher	Utility class for matching emails against proxy rules.
ProxyRule	Represents a single proxy rule configuration.
QueueDatabase<T>	Contract for a scheduled work queue with claim/ack semantics.
QueueFactory	Factory for creating QueueDatabase instances based on configuration.
QueueFiles	Queue file utilities.
QueueItem<T>	Persistent queue item with scheduling and claim metadata.
QueueItemState	Queue item lifecycle states.
QueueListFilter	Queue listing filter.
QueueMariaDB<T>	MariaDB implementation of QueueDatabase.
QueueMutation<T>	One queue-state mutation produced by a dequeue worker.
QueueMutationBatch<T>	Batch of queue mutations plus newly derived queue items.
QueueMutationBatch.Builder<T>
QueueMutationType	Mutation types applied after dequeue workers finish processing.
QueueOperationsHandler	Handles queue-related HTTP operations for the API endpoint.
QueuePage<T>	Paged queue listing.
QueuePayloadCodec	Encodes queue payloads using a compact RelaySession format with a Java serialization fallback.
QueuePgSQL<T>	PostgreSQL implementation of QueueDatabase.
QueueStats	Aggregate queue statistics.
QuotedPrintableDecoder	Quited printable decoding Apache commons altered decoder utility.
Random	Digest-MD5 authentication mechanism random generator.
Random	Random number and string generator.
RblChecker	RBL (Realtime Blackhole List) Checker.
RblConfig	Configuration class for RBL (Realtime Blackhole List) settings.
RblResult	Result of an RBL check.
ReceivedHeader	Received header builder.
RedisConnectionStore	Redis-backed implementation of ConnectionStore.
RedisQueueDatabase<T>	Redis-backed scheduled work queue.
RefCountedFileMessageSource	Reference-counted file message source for safe concurrent access.
RelayDeliveryResult	Data class to hold delivery result information for relay sessions.
RelayDequeue	Processes claimed relay queue items.
RelayMessage	Relay message.
RelayQueueService	Queue runtime that continuously dispatches ready work and periodically releases expired claims.
RelayQueueWorkResult	Result returned by one dequeue worker, applied later by the queue committer.
RelaySession	Relay session.
RequestBase	HTTP/S request base.
RequestBase.RequestType	Supported request types.
RequestClient	HTTP/S request client.
RequestConfig	Request case configuration container.
RequestExternalClient	Request external client.
RequestExternalClient.RequestClient	HTTP/S request client.
RequestPlugin	Request plugin.
RetryScheduler	Retry scheduler utility class.
RobinServiceEndpoint	Extended service endpoint for Robin-specific statistics.
RocksDbMailboxStore	RocksDB-backed mailbox store for Robin webmail-style access patterns.
RocksDbMailboxStore.FolderRecord
RocksDbMailboxStore.MailboxOwner
RocksDbMailboxStore.MessageRecord
RocksDbMailboxStoreManager	Shared RocksDB mailbox store lifecycle manager.
RocksDbStorageProcessor	Storage processor that persists Robin mailboxes into RocksDB.
RouteConfig	Client route configuration container.
RspamdClient	Rspamd antispam scanner client.
RspamdConfig	Rspamd configuration.
RspamdConfig.DkimSigningConfig	DKIM signing SQL lookup configuration.
RspamdDkimSigner	DKIM signer that delegates to Rspamd via its HTTP signing API.
ScenarioConfig	Server scenario configuration container.
SecureMxRecord	MX record with associated security policy.
SecureRandom	Digest-MD5 authentication mechanism random generator.
SecurityPolicy	Security policy for SMTP connections.
SecurityPolicy.PolicyType	Security policy type.
Server	Main server class for the Robin SMTP server.
ServerAuth	AUTH extension processor.
ServerCLI	Implementation of server CLI.
ServerConfig	Server configuration.
ServerData	DATA extension processor.
ServerEhlo	EHLO extension processor.
ServerHelp	HELP extension processor.
ServerMail	MAIL extension processor.
ServerProcessor	Server extension processor abstract.
ServerQuit	QUIT extension processor.
ServerRcpt	RCPT extension processor.
ServerRset	RSET extension processor.
ServerStartTls	STARTLS extension processor.
ServerXclient	XCLIENT extension processor.
ServiceEndpoint	Monitoring and management service endpoint.
Session	Session.
SessionBot	Session bot that replies with SMTP session analysis.
SessionRouting	Session routing based on MX resolution.
SessionTransactionList	Session transaction list.
SharedDataSource	SharedDataSource provides a lazily-initialized HikariDataSource singleton based on the Dovecot SQL configuration in `cfg/dovecot.json5` (authSql section).
Sleep	Sleep utility.
SlowInputStream	Input stream with slow data reading capability.
SlowOutputStream	Output stream with slow data writing capability.
SlowTransferOutputStream	Output stream wrapper that detects slow data transfer (slowloris attacks).
SmtpException	Smtp exception.
SmtpFoundation	SMTP foundation for socket reads and writes.
SmtpListener	SMTP socket listener for handling client connections.
SmtpMetrics	SMTP-related Micrometer metrics.
SmtpResponses	SMTP response code constants.
SpamStorageProcessor	Storage processor for spam scanning using Rspamd.
SqlAuthManager	SqlAuthManager holds shared instances of SqlAuthProvider and SqlUserLookup backed by the shared HikariDataSource.
SqlAuthProvider	SqlAuthProvider verifies credentials against a users table.
SQLQueueDatabase<T>	SQL-backed scheduled work queue.
SQLQueueDatabase.DBConfig
SqlUserLookup	SqlUserLookup provides user existence lookup against a configured SQL database.
SqlUserLookup.UserRecord
StalwartApiClient	Stalwart HTTP/JMAP client used by Robin direct mailbox delivery.
StalwartApiClient.CachedAccount
StalwartApiClient.ResolvedAccount
StalwartApiClient.SharedClientKey
StalwartApiClient.StalwartSession
StalwartConfig	Typed Stalwart direct-ingest configuration.
StalwartDirectDelivery	Direct Stalwart mailbox delivery helper backed by Stalwart HTTP/JMAP ingest.
StalwartStorageProcessor	Delivers inbound local mail directly into Stalwart using its native JMAP ingest path.
StaticDigestCache	Digest-MD5 authentication mechanism database.
StorageCleaner	Storage Cleaner.
StorageClient	Server file storage interface.
StorageDirectoryListing	Directory listing generator for the storage browser.
StorageProcessor	Storage processor interface.
StoreDraftOperations	Handles draft-related store operations.
StoreFolderOperations	Handles folder-related store operations.
StoreHandler	Handler for the /store endpoint.
StoreMessageOperations	Handles message-related store operations.
StoreRocksDbHandler	JSON-only handler for the RocksDB mailbox API.
StreamUtils	Stream utils.
StrictMx	Strict MX.
StrictTransportSecurity	Strict Transport Security.
StsDnsTxt	Strict Transport Security DNS TXT Abstract.
StsMode	Policy modes.
StsPolicy	Strict Transport Security Policy.
StsPolicyValidator	Strict Transport Security Policy Validator.
StsRecord	Strict Transport Security Record.
StsReport	Strict Transport Security Report.
TextMimePart	MIME part container from string.
TLSSocket	TLS socket with DANE and MTA-STS support.
Transaction	Transaction.
TransactionList	Transaction list.
TrustManager	Custom X509TrustManager implementation for production use.
UIDExtractor	UID Extractor.
UserConfig	Server user configuration container.
UsersConfig	Users configuration.
UsersHandler	Handler for the /users endpoint.
UsersHandler.UsersBackend	Backend types for user operations.
VaultClient	HashiCorp Vault client utility for secrets management.
VaultClient.Builder	Builder for VaultClient.
VaultClient.VaultException	Exception thrown when Vault operations fail.
VaultClientFactory	Factory for creating VaultClient instances from ServerConfig.
VaultConfig	Vault configuration.
VaultMagicProvider	Vault magic provider for integrating HashiCorp Vault secrets with Magic variables.
Verb	SMTP verb.
WebhookCaller	Webhook caller service.
WebhookCallerInterface	Interface for webhook caller implementations.
WebhookConfig	Webhook configuration.
WebhookResponse	Simple immutable container for webhook responses.
WhitelistConfig	Configuration class for connection whitelist settings.
WhitelistMatcher	Utility class for matching IP addresses against a trusted whitelist.
XBillDnsRecord	DNS Record.
XBillDnsRecordClient	XBill Dns Record Client.
XBillDnsRecordClient.PtrCacheEntry	PTR Cache Entry.
XclientBehaviour	Client behaviour with XCLIENT support.
XclientPlugin	XCLIENT plugin.
XclientSession	XCLIENT session.
XclientSession.XclientConfigMapper	Mapper for CaseConfig to Session with XCLIENT.