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* regarding copyright ownership. The ASF licenses this file *
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package org.apache.james.protocols.smtp.core.fastfail;
import org.apache.james.protocols.smtp.MailAddress;
import org.apache.james.protocols.smtp.SMTPRetCode;
import org.apache.james.protocols.smtp.SMTPSession;
import org.apache.james.protocols.smtp.dsn.DSNStatus;
import org.apache.james.protocols.smtp.hook.HookResult;
import org.apache.james.protocols.smtp.hook.HookReturnCode;
import org.apache.james.protocols.smtp.hook.RcptHook;
/**
* Handler which want todo an recipient check should extend this
*
*/
public abstract class AbstractValidRcptHandler implements RcptHook {
/**
* @see org.apache.james.protocols.smtp.hook.RcptHook#doRcpt(org.apache.james.protocols.smtp.SMTPSession, org.apache.mailet.MailAddress, org.apache.mailet.MailAddress)
*/
public HookResult doRcpt(SMTPSession session, MailAddress sender, MailAddress rcpt) {
boolean reject = false;
if (session.isRelayingAllowed()) {
// check if the domain is local, if so we still want to check if the recipient is valid or not as we want to fail fast in such cases
if (isLocalDomain(session, rcpt.getDomain())) {
if (isValidRecipient(session, rcpt) == false) {
reject = true;
}
}
} else {
if (isLocalDomain(session, rcpt.getDomain()) == false) {
session.getLogger().debug("Unknown domain " + rcpt.getDomain() + " so reject it");
} else {
if (isValidRecipient(session, rcpt) == false) {
reject= true;
}
}
}
if (reject) {
//user not exist
session.getLogger().info("Rejected message. Unknown user: " + rcpt.toString());
return new HookResult(HookReturnCode.DENY,SMTPRetCode.MAILBOX_PERM_UNAVAILABLE, DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.ADDRESS_MAILBOX) + " Unknown user: " + rcpt.toString());
} else {
return new HookResult(HookReturnCode.DECLINED);
}
}
/**
* Return true if email for the given recipient should get accepted
*
* @param recipient
* @return isValid
*/
protected abstract boolean isValidRecipient(SMTPSession session, MailAddress recipient);
/**
* Return true if the domain is local
*
* @param session
* @param domain
* @return local
*/
protected abstract boolean isLocalDomain(SMTPSession session, String domain);
}