config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Companyname_Sendmailregister>
            <version>0.0.1</version>
        </Companyname_Sendmailregister>
    </modules>


    <frontend>
    <events>
        <!--<customer_register_success>
            <observers>
                <Companyname_send_email_register>
                  <type>model</type>
                              <class>Companyname_Sendmailregister_Model_Observer</class>
                                  <method>customerRegisterSuccess</method>
                </Companyname_send_email_register>
            </observers>
        </customer_register_success>-->


        <customer_save_after>
           <observers>
             <Companyname_send_email_register>
            <type>model</type>
                <class>Companyname_Sendmailregister_Model_Observer</class>
            <method>customerRegisterSuccessCheckout</method>
             </Companyname_send_email_register>
           </observers>
        </customer_save_after>

    </events>
    </frontend>

    <global>
    <!--<template>
            <email>
                <notify_new_customer module="Companyname_Sendmailregister">
                    <label>Template to notify administrator that new customer is registered</label>
                    <file>notify_new_customer.html</file>
                    <type>html</type>
                </notify_new_customer>
            </email>
        </template>-->
    </global>

</config>