<xs:simpleType name="serviceCodeType">
    <xs:restriction base="xs:string">
        <xs:enumeration value="CM" />
        <xs:enumeration value="COD" />
        <xs:enumeration value="COM" />
        <xs:enumeration value="DC" />
        <xs:enumeration value="IM" />
        <xs:enumeration value="PAL" />
        <xs:enumeration value="RD" />
        <xs:enumeration value="RM" />
        <xs:enumeration value="RR" />
        <xs:enumeration value="RRE" />
        <xs:enumeration value="RRM" />
        <xs:enumeration value="SC" />
        <xs:enumeration value="SH" />
    </xs:restriction>
</xs:simpleType>

• serviceCodeType
• mailxml:ServiceCode
• mailxml:ServiceCode