How to Receive Emails to WSO2 ESB

1. Uncomment below line in <ESB_HOME>/repository/conf/axis2/axis2.xml/axis2.xml to enable Email transport listener.

   
 <transportReceiver name="mailto" class="org.apache.axis2.transport.mail.MailTransportListener">  
   

2. Restart WSO2 ESB if has already started.
3. Log in to Management console and add below proxy. 
Here, proxy transport type is mailto. The mailto transport supports sending messages (E-Mail) over SMTP and receiving messages over POP3 or IMAP.

   
 <?xml version="1.0" encoding="UTF-8"?>  
 <proxy xmlns="http://ws.apache.org/ns/synapse"  
     name="EmailReciever"  
     startOnLoad="true"  
     statistics="disable"  
     trace="disable"  
     transports="mailto">  
   <target>  
    <inSequence>  
      <log level="custom">  
       <property expression="$trp:Subject" name="Subject"/>  
      </log>  
      <drop/>  
    </inSequence>  
    <outSequence>  
      <send/>  
    </outSequence>  
   </target>  
   <parameter name="transport.PollInterval">5</parameter>  
   <parameter name="mail.pop3.host">pop.gmail.com</parameter>  
   <parameter name="mail.pop3.password">wso2pass</parameter>  
   <parameter name="mail.pop3.user">wso2user</parameter>  
   <parameter name="mail.pop3.socketFactory.port">995</parameter>  
   <parameter name="transport.mail.ContentType">text/plain</parameter>  
   <parameter name="mail.pop3.port">995</parameter>  
   <parameter name="mail.pop3.socketFactory.fallback">false</parameter>  
   <parameter name="transport.mail.Address">wso2user@gmail.com</parameter>  
   <parameter name="transport.mail.Protocol">pop3</parameter>  
   <parameter name="mail.pop3.socketFactory.class">javax.net.ssl.SSLSocketFactory</parameter>  
   <description/>  
 </proxy>  
   

4. Send email to wso2user@gmail.com. You can see the email recieving to ESB from the logs.
   

Note : If you are using gmail to receive emails, you have to allow external apps access in your google account as mention in here.