Manage incoming emails

[QuentinMaypic]

It is not a bug, but maybe a miscomprehension of how to use the smtp server.
I read a lot about sending emails, but what I want is to receive emails.
I configure my domain DNS and mu smtp server, and I receive my emails and store them in a database. Everything is working fine here.
What I want is to connect my gmail account to my smtp server so I can receive those emails into gmail directly.
I am not sure that it is possible without forwarding emails ? Basically, I want to connect to the smtp server through IMAP or POP3.

Thanks for your help !