What is IMAP Proxy server

It is a server that can be used to debug an actual IMAP server. Although many IMAP servers log IMAP communication to log files, these log files are hard to work with if you are looking to track a specific email. IMAP Proxy server is a very useful utility if you are trying to debug problems with your email server. It can tell you:
  • Who is fetching emails from your server
  • What commands are being sent by the client
  • How does your server respond to these commands

By setting up a IMAP proxy server between sender and receiver, you can find out if the messages are going through the way they should be.
Imap Proxy server diagram


You need Java (JDK 1.4 or newer) installed on your machine before you can run it.


You can either download Imap Proxy or run it as an Applet within your browser.
Download (200 KB) Run as Applet
Click here to download the file. Make sure that it gets downloaded as .JAR (Sometimes Internet Explorer changes the extension to .ZIP). Once downloaded run the application by typing the following command.

You only need this one file to run the application.

    java -jar IMAPProxy.jar

Typically IMAP servers listen on TCP/IP port 143, which is a privileged port and Java applets are not allowed to open a TCP/IP socket on this port. In order to bypass this restriction we had to sign the JAR files. If you decide to chose this option you will have to accept our signed certificate on the next page.

Click here to run it as an applet.

Run as Applet

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