I have configured exim4 on my Debian system and I am able to send emails from the server as a user and receive emails to this user. I am also able to connect mail client such as thunderbird/bluemail and I can use these to send emails but what I am unable to do is read them.
When I use i.e my Gmail account and send email to my @example email account it reaches the server, and the mail is saved in /home/user/new directory but I do not know why but either programs can not read those emails.