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| <span class="title">Apache James Server</span> |
| <span class="version">3.6.0 Snapshot</span> |
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| <article class="doc"> |
| <h1 class="page">Distributed James Server — SMTP Hooks</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This documentation page lists and documents SMTP hooks that can be used within the |
| Distributed Server SMTP protocol stack in order to customize the way your SMTP server |
| behaves with out of the box components.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_dnsrblhandler"><a class="anchor" href="#_dnsrblhandler"></a>DNSRBLHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This command handler check against <a href="https://www.wikiwand.com/en/Domain_Name_System-based_Blackhole_List">RBL-Lists</a> |
| (Real-time Blackhole List).</p> |
| </div> |
| <div class="paragraph"> |
| <p>If getDetail is set to true it try to retrieve information from TXT Record |
| why the ip was blocked. Default to false.</p> |
| </div> |
| <div class="paragraph"> |
| <p>before you enable out the DNS RBL handler documented as an example below, |
| please take a moment to review each block in the list. |
| We have included some that various JAMES committers use, |
| but you must decide which, if any, are appropriate |
| for your environment.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The mail servers hosting |
| @apache.org mailing lists, for example, use a |
| slightly different list than we have included below. |
| And it is likely that most JAMES committers also have |
| slightly different sets of lists.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The SpamAssassin user’s list would be one good place to discuss the |
| measured quality of various block lists.</p> |
| </div> |
| <div class="paragraph"> |
| <p>NOTA BENE: the domain names, below, are terminated |
| with '.' to ensure that they are absolute names in |
| DNS lookups. Under some circumstances, names that |
| are not explicitly absolute could be treated as |
| relative names, leading to incorrect results. This |
| has been observed on *nix and MS-Windows platforms |
| by users of multiple mail servers, and is not JAMES |
| specific. If you are unsure what this means for you, |
| please speak with your local system/network admins.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.DNSRBLHandler"> |
| <getDetail>false</getDetail> |
| <rblservers> |
| <whitelist>query.bondedsender.org.</whitelist> |
| <blacklist>sbl-xbl.spamhaus.org.</blacklist> |
| <blacklist>dul.dnsbl.sorbs.net.</blacklist> |
| <blacklist>list.dsbl.org.</blacklist> |
| </rblservers> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_dsn_hooks"><a class="anchor" href="#_dsn_hooks"></a>DSN hooks</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The Distributed server has optional support for DSN (<a href="https://tools.ietf.org/html/rfc3461">RFC-3461</a>)</p> |
| </div> |
| <div class="paragraph"> |
| <p>Please read carefully <a href="dsn.html" class="xref page">this page</a>.</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><smtpserver enabled="true"> |
| <...> <!-- The rest of your SMTP configuration, unchanged --> |
| <handlerchain> |
| <handler class="org.apache.james.smtpserver.dsn.DSNEhloHook"/> |
| <handler class="org.apache.james.smtpserver.dsn.DSNMailParameterHook"/> |
| <handler class="org.apache.james.smtpserver.dsn.DSNRcptParameterHook"/> |
| <handler class="org.apache.james.smtpserver.dsn.DSNMessageHook"/> |
| <...> <!-- other handlers, like: --> |
| <handler class="org.apache.james.smtpserver.CoreCmdHandlerLoader"/> <!-- for instance --> |
| </handlerchain> |
| </smtpserver></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Note that a specific configuration of <a href="mailetcontainer.html" class="xref page">mailetcontainer.xml</a> is |
| required as well to be spec compliant.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_mailpriorityhandler"><a class="anchor" href="#_mailpriorityhandler"></a>MailPriorityHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This handler can add a hint to the mail which tells the MailQueue which email should get processed first.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Normally the MailQueue will just handles Mails in FIFO manner.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Valid priority values are 1,5,9 where 9 is the highest.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.MailPriorityHandler"> |
| <priorityEntries> |
| <priorityEntry> |
| <domain>yourdomain1</domain> |
| <priority>1</priority> |
| </priorityEntry> |
| <priorityEntry> |
| <domain>yourdomain2</domain> |
| <priority>9</priority> |
| </priorityEntry> |
| <priorityEntries> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_maxrcpthandler"><a class="anchor" href="#_maxrcpthandler"></a>MaxRcptHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>If activated you can limit the maximal recipients.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.MaxRcptHandler"> |
| <maxRcpt>10</maxRcpt> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_pop3beforesmtphandler"><a class="anchor" href="#_pop3beforesmtphandler"></a>POP3BeforeSMTPHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This connect handler can be used to enable POP3 before SMTP support.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Please note that only the ip get stored to identify an authenticated client.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The expireTime is the time after which an ipAddress is handled as expired.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered as unsupported.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.POP3BeforeSMTPHandler"> |
| <expireTime>1 hour</expireTime> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_resolvableehlohelohandler"><a class="anchor" href="#_resolvableehlohelohandler"></a>ResolvableEhloHeloHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Checks for resolvable HELO/EHLO before accept the HELO/EHLO.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If checkAuthNetworks is set to true sender domain will be checked also for clients that |
| are allowed to relay. Default is false.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.ResolvableEhloHeloHandler"/> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_reverseequalsehlohelohandler"><a class="anchor" href="#_reverseequalsehlohelohandler"></a>ReverseEqualsEhloHeloHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Checks HELO/EHLO is equal the reverse of the connecting client before accept it |
| If checkAuthNetworks is set to true sender domain will be checked also for clients that |
| are allowed to relay. Default is false.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.ReverseEqualsEhloHeloHandler"/> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_setmimeheaderhandler"><a class="anchor" href="#_setmimeheaderhandler"></a>SetMimeHeaderHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This handler allows you to add mime headers to the processed mails.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.SetMimeHeaderHandler"> |
| <headername>SPF-test</headername> |
| <headervalue>passed</headervalue> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_spamassassinhandler"><a class="anchor" href="#_spamassassinhandler"></a>SpamAssassinHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This MessageHandler could be used to check message against spamd before |
| accept the email. So its possible to reject a message on smtplevel if a |
| configured hits amount is reached.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.SpamAssassinHandler"> |
| <spamdHost>127.0.0.1</spamdHost> |
| <spamdPort>783</spamdPort> |
| <spamdRejectionHits>10</spamdRejectionHits> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_spfhandler"><a class="anchor" href="#_spfhandler"></a>SPFHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This command handler can be used to reject emails with not match the SPF record of the sender domain.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If checkAuthNetworks is set to true sender domain will be checked also for clients that |
| are allowed to relay. Default is false.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.SPFHandler"> |
| <blockSoftFail>false</blockSoftFail> |
| <blockPermError>true</blockPermError> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_urirblhandler"><a class="anchor" href="#_urirblhandler"></a>URIRBLHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This MessageHandler could be used to extract domain out of the message and check |
| this domains against uriRbllists. See <a href="http://www.surbl.org" class="bare">http://www.surbl.org</a> for more information. |
| The message get rejected if a domain matched.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered experimental.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.URIRBLHandler"> |
| <action>reject</action> |
| <getDetail>true</getDetail> |
| <uriRblServers> |
| <server>multi.surbl.org</server> |
| </uriRblServers> |
| </handler> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_validrcpthandler"><a class="anchor" href="#_validrcpthandler"></a>ValidRcptHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>With ValidRcptHandler, all email will get rejected which has no valid user.</p> |
| </div> |
| <div class="paragraph"> |
| <p>You need to add the recipient to the validRecipient list if you want |
| to accept email for a recipient which not exist on the server.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If you want James to act as a spamtrap or honeypot, you may comment ValidRcptHandler |
| and implement the needed processors in spoolmanager.xml.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This handler should be considered stable.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.ValidRcptHandler"/> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_validsenderdomainhandler"><a class="anchor" href="#_validsenderdomainhandler"></a>ValidSenderDomainHandler</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>If activated mail is only accepted if the sender contains |
| a resolvable domain having a valid MX Record or A Record associated!</p> |
| </div> |
| <div class="paragraph"> |
| <p>If checkAuthNetworks is set to true sender domain will be checked also for clients that |
| are allowed to relay. Default is false.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example configuration:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre><handlerchain> |
| <!-- ... --> |
| <handler class="org.apache.james.smtpserver.fastfail.ValidSenderDomainHandler"/> |
| </handlerchain></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </article> |
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