is it possible to run mailserver on a different machine ?

[joydeep]

Dear list,

Is it possible to run a mailserver on a remote pc which doesn't have DNS server on it ?
I am totally confused about it. I like to setup egroupware on a remote server configured by PLESK. but due to the expiration of the license I am going to remove the PLESK from that server. hence I'll lose all the DNS configuration set by PLESK. now if I point that server through dydns is it posible to send receive mail from that server ?

I also like to know about any free web-based tool which can let me configured the DNS and mail related setting in that remote server.

please enlighten me.