You have deleted the map msimn from your computer but now you can no longer read mails or send mails. Error on msimn.exe is the pop-up. How can you solve this problem?

You will need your operating system disk to solve this. Go to your control panel, then to add/remove programs. Then to add / remove windows components find the e-mail program and uncheck it to remove it totally. Then close it out go there again and re-check it. This should re-install the program.