public String getDeliveryStatus() {
        return this.deliveryStatus;
    }
<p>
The delivery status of the message. Possible values are:
</p>
<ul>
<li>
<p>
DUPLICATE - The endpoint address is a duplicate of another endpoint address. Amazon Pinpoint won't attempt to
send the message again.
</p>
</li>
<li>
<p>
OPT_OUT - The user who's associated with the endpoint address has opted out of receiving messages from you.
Amazon Pinpoint won't attempt to send the message again.
</p>
</li>
<li>
<p>
PERMANENT_FAILURE - An error occurred when delivering the message to the endpoint address. Amazon Pinpoint won't
attempt to send the message again.
</p>
</li>
<li>
<p>
SUCCESSFUL - The message was successfully delivered to the endpoint address.
</p>
</li>
<li>
<p>
TEMPORARY_FAILURE - A temporary error occurred. Amazon Pinpoint won't attempt to send the message again.
</p>
</li>
<li>
<p>
THROTTLED - Amazon Pinpoint throttled the operation to send the message to the endpoint address.
</p>
</li>
<li>
<p>
UNKNOWN_FAILURE - An unknown error occurred.
</p>
</li>
</ul>

@return The delivery status of the message. Possible values are:</p>
        <ul>
        <li>
        <p>
        DUPLICATE - The endpoint address is a duplicate of another endpoint address. Amazon Pinpoint won't
        attempt to send the message again.
        </p>
        </li>
        <li>
        <p>
        OPT_OUT - The user who's associated with the endpoint address has opted out of receiving messages from
        you. Amazon Pinpoint won't attempt to send the message again.
        </p>
        </li>
        <li>
        <p>
        PERMANENT_FAILURE - An error occurred when delivering the message to the endpoint address. Amazon
        Pinpoint won't attempt to send the message again.
        </p>
        </li>
        <li>
        <p>
        SUCCESSFUL - The message was successfully delivered to the endpoint address.
        </p>
        </li>
        <li>
        <p>
        TEMPORARY_FAILURE - A temporary error occurred. Amazon Pinpoint won't attempt to send the message again.
        </p>
        </li>
        <li>
        <p>
        THROTTLED - Amazon Pinpoint throttled the operation to send the message to the endpoint address.
        </p>
        </li>
        <li>
        <p>
        UNKNOWN_FAILURE - An unknown error occurred.
        </p>
        </li>
@see DeliveryStatus
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/MessageResult.java