bool
SMTPDeliverer::_RunGlobalRules(shared_ptr<Message> pMessage, RuleResult &ruleResult)
//---------------------------------------------------------------------------()
// DESCRIPTION:
// Performs global rules. We will do this on every retry of the message.
//---------------------------------------------------------------------------()
{
shared_ptr<RuleApplier> pRuleApplier = shared_ptr<RuleApplier>(new RuleApplier);
shared_ptr<Account> emptyAccount;
pRuleApplier->ApplyRules(ObjectCache::Instance()->GetGlobalRules(), emptyAccount, pMessage, ruleResult);
if (ruleResult.GetDeleteEmail())
{
String sDeleteRuleName = ruleResult.GetDeleteRuleName();
String sMessage;
sMessage.Format(_T("SMTPDeliverer - Message %I64d: ")
_T("Message deleted. Action was taken by a global rule (%s). "),
pMessage->GetID(),
sDeleteRuleName);
LOG_APPLICATION(sMessage);
PersistentMessage::DeleteObject(pMessage);
return false;
}
return true;
}
/// Resolves IP addresses for the recipient servers. This will either be a MX
/// lookup, or a A lookup, if SMTP relaying is used.
bool
ExternalDelivery::_ResolveRecipientServer(shared_ptr<ServerInfo> &serverInfo, vector<shared_ptr<MessageRecipient> > &vecRecipients, vector<String> &saMailServers)
{
DNSResolver resolver;
// Resolve the specified hosts.
bool dnsQueryOK = false;
if (serverInfo->GetFixed())
{
String relayServer = serverInfo->GetHostName();
LOG_APPLICATION("SMTPDeliverer - Message " + StringParser::IntToString(_originalMessage->GetID()) + ": Relaying to host " + relayServer + ".");
vector<String> mailServerHosts;
if (relayServer.Find(_T("|")) > 0)
mailServerHosts = StringParser::SplitString(relayServer, "|");
else
mailServerHosts.push_back(relayServer);
boost_foreach(String host, mailServerHosts)
{
// The actual resolution of these host names to IP addresses,
// are taken care of by TCPConnection::Connect.
saMailServers.push_back(host);
}
bool
Events::FireOnDeliveryStart(std::shared_ptr<Message> pMessage)
{
if (!Configuration::Instance()->GetUseScriptServer())
return true;
std::shared_ptr<ScriptObjectContainer> pContainer = std::shared_ptr<ScriptObjectContainer>(new ScriptObjectContainer);
std::shared_ptr<Result> pResult = std::shared_ptr<Result>(new Result);
pContainer->AddObject("HMAILSERVER_MESSAGE", pMessage, ScriptObject::OTMessage);
pContainer->AddObject("Result", pResult, ScriptObject::OTResult);
String sEventCaller = "OnDeliveryStart(HMAILSERVER_MESSAGE)";
ScriptServer::Instance()->FireEvent(ScriptServer::EventOnDeliveryStart, sEventCaller, pContainer);
switch (pResult->GetValue())
{
case 1:
{
String sMessage;
sMessage.Format(_T("SMTPDeliverer - Message %I64d: ")
_T("Message deleted. Action was taken by script subscribing to OnDeliveryStart."),
pMessage->GetID());
LOG_APPLICATION(sMessage);
PersistentMessage::DeleteObject(pMessage);
return false;
}
}
return true;
}
void
POP3ClientConnection::ParseStateCAPASent_(const String &sData)
{
if (!CommandIsSuccessfull_(sData) || !sData.Contains(_T("STLS")))
{
// STLS is not supported.
if (GetConnectionSecurity() == CSSTARTTLSRequired)
{
String message =
Formatter::Format("The download of messages from external account {0} failed. The external aAccount is configured to use STARTTLS connection security, but the POP3 server does not support it.", account_->GetName());
LOG_APPLICATION(message)
QuitNow_();
return;
}
else
{
SendUserName_();
return;
}
}
EnqueueWrite_("STLS");
current_state_ = StateSTLSSent;
}
void
SMTPDeliverer::DeliverMessage(shared_ptr<Message> pMessage)
//---------------------------------------------------------------------------()
// DESCRIPTION:
// Submits the next message in the database.
//---------------------------------------------------------------------------()
{
LOG_DEBUG("Delivering message...");
if (!pMessage)
{
ErrorManager::Instance()->ReportError(ErrorManager::Medium, 4217, "SMTPDeliverer::DeliverMessage()", "The message to deliver was not given.");
return;
}
// Fetch the message ID before we delete the message and it's reset.
__int64 messageID = pMessage->GetID();
String sSendersIP;
RuleResult globalRuleResult;
if (!_PreprocessMessage(pMessage, sSendersIP, globalRuleResult))
{
// Message delivery was aborted during preprocessing.
return;
}
vector<String> saErrorMessages;
// Perform deliver to local recipients.
LocalDelivery localDeliverer(sSendersIP, pMessage, globalRuleResult);
bool messageReused = localDeliverer.Perform(saErrorMessages);
bool messageRescheduled = false;
if (pMessage->GetRecipients()->GetCount() > 0)
{
// Perform deliveries to external recipients.
ExternalDelivery externalDeliverer(sSendersIP, pMessage, globalRuleResult);
messageRescheduled = externalDeliverer.Perform(saErrorMessages);
}
// If an error has occurred, now is the time to send an error
// message back to the author of the email message.
if (saErrorMessages.size() > 0)
_SubmitErrorLog(pMessage, saErrorMessages);
// Unless the message has been re-used, or has been rescheduled for
// later delivery, we should delete it now.
bool deleteMessageNow = !messageReused && !messageRescheduled;
if (deleteMessageNow)
{
// Check that we haven't reused this message before we delete it.
if (pMessage->GetAccountID() > 0)
{
String errorMessage;
errorMessage.Format(_T("Attempting to delete message %I64d even though it's been delivered to user account %I64d ."), messageID, pMessage->GetAccountID());
ErrorManager::Instance()->ReportError(ErrorManager::High, 5208, "SMTPDeliverer::DeliverMessage", errorMessage);
return;
}
PersistentMessage::DeleteObject(pMessage);
}
String logText;
logText.Format(_T("SMTPDeliverer - Message %I64d: Message delivery thread completed."), messageID);
LOG_APPLICATION(logText);
return;
}
bool
SMTPDeliverer::_HandleInfectedMessage(shared_ptr<Message> pMessage, const String &virusName)
//---------------------------------------------------------------------------()
// DESCRIPTION:
// Called if a virus is found in an email message. Checks in the configuration
// what we should do with infected messages and does just that.
//---------------------------------------------------------------------------()
{
AntiVirusConfiguration &antiVirusConfig = Configuration::Instance()->GetAntiVirusConfiguration();
if (antiVirusConfig.AVAction() == AntiVirusConfiguration::ActionDelete)
{
// The message should be deleted.
// Should we notify the recipient?
if (antiVirusConfig.AVNotifyReceiver())
{
// Notify every receiver of the email.
vector<shared_ptr<MessageRecipient> > &vecRecipients = pMessage->GetRecipients()->GetVector();
vector<shared_ptr<MessageRecipient> >::iterator iterRecipient = vecRecipients.begin();
while (iterRecipient != vecRecipients.end())
{
SMTPVirusNotifier::CreateMessageDeletedNotification(pMessage, (*iterRecipient)->GetAddress());
iterRecipient++;
}
}
if (antiVirusConfig.AVNotifySender())
SMTPVirusNotifier::CreateMessageDeletedNotification(pMessage, pMessage->GetFromAddress());
String logMessage = Formatter::Format("SMTPDeliverer - Message {0}: Message deleted (contained virus {1}).",
pMessage->GetID(), virusName);
LOG_APPLICATION(logMessage);
PersistentMessage::DeleteObject(pMessage);
return false; // do not continue delivery
}
else if (antiVirusConfig.AVAction() == AntiVirusConfiguration::ActionStripAttachments)
{
shared_ptr<MessageAttachmentStripper> pStripper = shared_ptr<MessageAttachmentStripper>(new MessageAttachmentStripper());
pStripper->Strip(pMessage);
String logMessage = Formatter::Format("SMTPDeliverer - Message {0}: Message attachments stripped (contained virus {1}).",
pMessage->GetID(), virusName);
LOG_APPLICATION(logMessage);
return true; // continue delivery
}
// Weird configuration?
assert(0);
return false;
}
//---------------------------------------------------------------------------()
// DESCRIPTION:
// Performs preprocessing of the message. Checks that the file exists, runs
// global rules, virus scanning and mirroring.
//
// Returns true if delivery should continue. False if it should be aborted.
//---------------------------------------------------------------------------()
bool
SMTPDeliverer::_PreprocessMessage(shared_ptr<Message> pMessage, String &sendersIP, RuleResult &globalRuleResult)
{
// Before we do anything else, check that the message file exists. If the file
// does not exist, there is nothing to deliver. So if the file does not exist,
// delete pMessage from the database and report in the application log.
const String messageFileName = PersistentMessage::GetFileName(pMessage);
if (!FileUtilities::Exists(messageFileName))
{
ErrorManager::Instance()->ReportError(ErrorManager::Medium, 5006, "SMTPDeliverer::DeliverMessage()", "Message " + StringParser::IntToString(pMessage->GetID()) + " could not be delivered since the data file does not exist.");
PersistentMessage::DeleteObject(pMessage);
return false;
}
if (pMessage->GetRecipients()->GetCount() == 0)
{
// No remaining recipients.
ErrorManager::Instance()->ReportError(ErrorManager::Medium, 5007, "SMTPDeliverer::DeliverMessage()", "Message " + StringParser::IntToString(pMessage->GetID()) + " could not be delivered. No remaining recipients. File: " + messageFileName);
PersistentMessage::DeleteObject(pMessage);
return false;
}
if (AWStats::GetEnabled())
{
sendersIP = MessageUtilities::GetSendersIP(pMessage);
}
// Create recipient list.
String sRecipientList = pMessage->GetRecipients()->GetCommaSeperatedRecipientList();
String sMessage = Formatter::Format("SMTPDeliverer - Message {0}: Delivering message from {1} to {2}. File: {3}",
pMessage->GetID(), pMessage->GetFromAddress(), sRecipientList, messageFileName);
LOG_APPLICATION(sMessage);
// Run the first event in the delivery chain
if (!Events::FireOnDeliveryStart(pMessage))
{
_LogAwstatsMessageRejected(sendersIP, pMessage, "Delivery cancelled by OnDeliveryStart-event");
return false;
}
if (pMessage->GetRecipients()->GetCount() == 0)
{
vector<String> saErrorMessages;
_SubmitErrorLog(pMessage, saErrorMessages);
PersistentMessage::DeleteObject(pMessage);
return false;
}
// Run virus protection.
if (!_RunVirusProtection(pMessage))
{
_LogAwstatsMessageRejected(sendersIP, pMessage, "Message delivery cancelled during virus scanning");
return false;
}
// Apply rules on this message.
if (!_RunGlobalRules(pMessage, globalRuleResult))
{
_LogAwstatsMessageRejected(sendersIP, pMessage, "Message delivery cancelled during global rules");
return false;
}
// Run the OnDeliverMessage-event
if (!Events::FireOnDeliverMessage(pMessage))
{
_LogAwstatsMessageRejected(sendersIP, pMessage, "Message delivery cancelled during OnDeliverMessage-event");
return false;
}
// Run mirroring
if (pMessage->GetNoOfRetries() == 0)
{
MirrorMessage mirrorer(pMessage);
mirrorer.Send();
}
return true;
}
