server/apps/postgres-app/src/main/resources/defaultMailetContainer.xml

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<processors>
    <processor state="root" enableJmx="false">
        <mailet match="All" class="PostmasterAlias"/>
        <mailet match="RelayLimit=30" class="Null"/>
        <mailet match="All" class="ToProcessor">
            <processor>transport</processor>
        </mailet>
    </processor>

    <processor state="error" enableJmx="false">
        <mailet match="All" class="Bounce"/>
        <mailet match="All" class="Null"/>
    </processor>


    <processor state="transport" enableJmx="false">
        <mailet match="SMTPAuthSuccessful" class="SetMimeHeader">
            <name>X-UserIsAuth</name>
            <value>true</value>
        </mailet>
        <mailet match="All" class="RemoveMimeHeader">
            <name>bcc</name>
        </mailet>
        <mailet match="All" class="RecipientRewriteTable" />
        <mailet match="RecipientIsLocal" class="LocalDelivery"/>
        <mailet match="HostIsLocal" class="ToProcessor">
            <processor>local-address-error</processor>
            <notice>550 - Requested action not taken: no such user here</notice>
        </mailet>
        <mailet match="SMTPAuthSuccessful" class="RemoteDelivery">
            <outgoingQueue>outgoing</outgoingQueue>
            <delayTime>5000, 100000, 500000</delayTime>
            <maxRetries>3</maxRetries>
            <maxDnsProblemRetries>0</maxDnsProblemRetries>
            <deliveryThreads>10</deliveryThreads>
            <sendpartial>true</sendpartial>
            <bounceProcessor>bounces</bounceProcessor>
        </mailet>
        <mailet match="All" class="ToProcessor">
            <processor>relay-denied</processor>
        </mailet>
    </processor>

    <processor state="spam" enableJmx="false">
        <mailet match="All" class="Null"/>
    </processor>

    <processor state="local-address-error" enableJmx="false">
        <mailet match="All" class="Bounce">
            <attachment>none</attachment>
        </mailet>
        <mailet match="All" class="Null"/>
    </processor>

    <processor state="relay-denied" enableJmx="false">
        <mailet match="All" class="Bounce">
            <attachment>none</attachment>
        </mailet>
        <mailet match="All" class="Null"/>
    </processor>

    <processor state="bounces" enableJmx="false">
        <mailet match="All" class="DSNBounce">
            <passThrough>false</passThrough>
        </mailet>
    </processor>

</processors>