<bean id="emails" class="org.some.package.SomeClass">
  <property name="emailList">
  <list>
    <value>pechorin@hero.org</value>
    <value>raskolnikov@slums.org</value>
    <value>stavrogin@gov.org</value>
    <value>porfiry@gov.org</value>
  </list>
</property>
</bean>

<property name="commonProp">
  <list>
    <value>pechorin@hero.org</value>
    <value>raskolnikov@slums.org</value>
    <value>stavrogin@gov.org</value>
    <value>porfiry@gov.org</value>
  </list>
</property>

<bean id="emailsOne" class="org.some.package.ClassOne">
  <property name="emailList" ref="commonProp" />
</bean>

<bean id="emailsTwo" class="org.some.package.ClassTwo">
  <property name="emailList" ref="commonProp" />
</bean>