@Service
public class ApplicationMailer {

    @Autowired
    private JavaMailSender mailSender;

    public ApplicationMailer() {}

    public void sendMail(String to, String subject, String body) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setTo(to);
        message.setSubject(subject);
        message.setText(body);
        mailSender.send(message);
    }

    public void sendHtml(String to, String subject, String body) throws MessagingException {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, false, "utf-8");
        mimeMessage.setContent(body, "text/html");
        helper.setTo(to);
        helper.setSubject(subject);
        mailSender.send(mimeMessage);
    }

}

<?xml version="1.0" encoding="UTF-8"?>
<beans ...>

    <context:annotation-config />

    <mvc:annotation-driven />

    <tx:annotation-driven/>

    <context:component-scan base-package="com.site" />

    <mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />

    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />

    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans ...>

    <context:property-placeholder location="classpath:/mail/gmail.com.properties" ignore-unresolvable="true" />

    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="javaMailProperties">
            <props>
                <prop key="mail.debug">true</prop>
                <prop key="mail.smtps.auth">${mail.smtps.auth}</prop>
            </props>
        </property>
        <property name="host" value="${mail.host}" />
        <property name="port" value="${mail.port}" />
        <property name="username" value="${mail.username}" />
        <property name="password" value="${mail.password}" />
        <property name="protocol" value="${mail.protocol}" />
    </bean>

    <!-- Шаблон письма -->
    <bean id="templateMessage" class="org.springframework.mail.SimpleMailMessage">
        <property name="from" value="${mail.from}" />
        <property name="subject" value="Mail subject" />
    </bean>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans ...>

    <context:annotation-config />
    <context:component-scan base-package="com.site.dao" />

    <context:component-scan base-package="com.site.service" />

    <tx:annotation-driven transaction-manager="transactionManager" />

    <context:property-placeholder location="classpath:db/mysql.properties" system-properties-mode="OVERRIDE"/>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="${database.url}" />
        <property name="username" value="${database.username}" />
        <property name="password" value="${database.password}" />
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
          p:packagesToScan="com.linkedcrm.entity" p:dataSource-ref="dataSource">
        <property name="jpaVendorAdapter">
            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
        </property>
        <property name="jpaProperties">
            <props>

                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>

                <prop key="hibernate.show_sql">true</prop>

                <prop key="hibernate.initDB">true</prop>

                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">create</prop>

                <prop key="logging.level.org.hibernate.SQL">DEBUG</prop>
                <prop key="logging.level.org.hibernate.type">TRACE</prop>

            </props>
        </property>
    </bean>

    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

</beans>

@Autowired
private JavaMailSender mailSender;