Dwarf Mail Server: Changes

Changes

MIME: fixed parsing of MIME boundary parameter in multipart messages
MIME: fixed parsing of message/rfc822 mime type
IMAP: fixed UID and UIDVALIDITY values to 32bit unsigned integers
IMAP: BODYSTRUCTURE did not include the Content-Type parameters
IMAP: improved BODYSTRUCTURE to return missing extended MIME body fields
POP3: fixed support for non-standard parameterless POP3 AUTH command (MS Outlook/Entourage)
IMAP: non-ascii internet addresses were sent as string instead of literal in IMAP responses
SMTP: some SMTP error codes were incorrectly regarded as permanent, which might cause the delivery process to fail
MIME: fixed parsing of multi-line Content-Type header when searching for the MIME boundary parameter

fixed responding of SMTP client to non-standard 250 return code after DATA command
scheduling algorithm of mail queue did not work well for long-standing deferred messages
SyncFileMailStore did not work properly for virtual mail hosts
message attachment download in webmail now uses original file names in generated URLs
improved handling of temporary error conditions during the SMTP relaying
node macros (#local, #remote, #all) did not work for expanding the ETRN nodes
fixed IMAP BODYSTRUCTURE command crash for malformed MIME messages
added support for broken POP3 AUTH command with no arguments
fixed possible integer overflows during the SMTP delivery timeout tests

new SyncFileMailStore allows better simultaneous access to mailboxes and provides some performance improvements
FileMailStore may be configured to map a single user account to the namespace of other users via new setSharedUser and setSharedPrefix methods

MailEvent now requires one additional argument with the user name for creating a mail event

ACL extension in IMAP server now depends on the "checkACL" configuration parameter
removed JavaMail provider for the Maildir message store
removed StatisticsAgent service, the preferred way of gathering the statistics data in the future will be by analyzing mail logs

GenericFileStore by default creates backup file for each serialized object, it may be disabled by new setBackupObjects(boolean) method
new IsNotDSN filter matches only those messages which are not DSN notifications generated by the local server

FileMailQueue always deleted finished messages by ignoring the setDeleteFinished(boolean) setting
SMTP server might fail to recognize a valid virtual users in some cases
implementation of isLocalUser(String) in MailAgentContext might not work for virtual users because of missing domain part in the argument
temporary failure in SMTP "RCPT TO" command was not regarded as temporary but a persistent one
socket write errors were not handled properly when polling the cached SMTP connections, which might cause a delivery failure

UserIsLocal mail filter became deprecated, because it does the same thing as RecipientIsLocal
method isLocalUser(String) in MailAgentContext now must work for virtual users, too, i.e. the argument may be also an email address instead of the simple user name

processing of SMTP mail queue has been serialized in a way that single node is always processed by one thread only, which leads to lesser number of concurrent threads. The number of requests in the queue has been significantly decreased, too. This new default behavior may be disabled by setting the "singleRequest" configuration parameter of QueueManager to false.

automatic ACL updates were not reflected by other simultaneous connections
IMAPHandler incorrectly passed some mail events to nested folders, thus causing a bogus client update responses
FileMailStore did not handle folder locking correctly, which might break the concurrent access in busy environments
queued SMTP messages might stay unfinished forever due to unhandled exceptions caused by the remote delivery process

MailFolder now provides integer READ_ONLY and READ_WRITE constants, which must be passed to the modified open(int) method, and may be obtained from the new getMode() method. The protected field mode has been removed.

POPHandler now implements the MailEventListener interface in order to better handle concurrent access to mailboxes
clarified and improved documentation

new checkACL and updateACL attributes in POPParameters for using the ACLs in POP3 server

rewrited message flags handling in FileMailStore for better simultaneous access to mailboxes

This is the first public release of Dwarf Mail Server.

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