Message body is garbled in Gmail
<target name="sendtestreport">
    <tstamp>
        <format property="current.time" pattern="MM/dd/yyyy hh:mm" />
    </tstamp>
    <property name="subject" value="Selenium Test Report: " />

    <mail mailhost="test.de" mailport="25" subject="${subject} ${current.time}"
        user="seleniumtests@test.de" password="password" messagemimetype="text/html">
        <from address="seleniumtests@test.com" />
        <replyto address="test@gmail.com" />
        <to address="test@gmail.com" />
        <message src="${basedir}test-outputemailable-report.html">If you have trouble viewing the message then open attachment</message>
        <attachments>
            <fileset dir="${basedir}">
                <include name="**/emailable-report.html"/>
            </fileset>
        </attachments>
    </mail>
</target>