Unable to locate provider for protocol: smtp

Question

New to spring. I'm getting the following exception being caught:

2012-06-14 16:20:57,719 [http-8080-6] ERROR com.nimchip.lmu.data.service.impl.CoworkerServiceImpl - Error sending mail:
org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.NoSuchProviderException: Unable to locate provider for protocol: smtp. Failed messages: javax.mail.NoSuchProviderException: Unable to locate provider for protocol: smtp
    at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:400) ~[spring-context-support-3.1.0.RELEASE.jar:3.1.0.RELEASE]
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:306) ~[spring-context-support-3.1.0.RELEASE.jar:3.1.0.RELEASE]
    at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:296) ~[spring-context-support-3.1.0.RELEASE.jar:3.1.0.RELEASE]
    at com.nimchip.lmu.data.service.impl.CoworkerServiceImpl.genUpdateNomination(CoworkerServiceImpl.java:224) ~[lmu-dataaccess-1.0.0.jar:na]
    at com.nimchip.lmu.controller.coworkerNom.CoworkerController.genUpdateNomination(CoworkerController.java:312)

I have a mail-config.xml which is registered in my web.xml. Here it is:

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="10.30.137.190"/>
        <property name="port" value="25"/>
    </bean>

</beans>

I should be able to log anonymously to the mail server specified, so no user or password needed.

What am I missing?

Answer 1

Do you have the mail.jar and activation.jarin your classpath?

These classes should provide the smtp-provider.

If you are using maven, simply add this to your pom:

    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4</version>
    </dependency>

    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>1.0.2</version>
    </dependency>