I'm trying to setup iredmail to deliver mail locally to a domain that must remain local only (e.g. mycompany.localdomain) and deliver email externally to other accounts (mycompany1.com, mycompany2.net). I've tried to configure bcc_maps, transports_maps and I cant get it working and dont know the reason... Can some one give me a help about it? I have to maintain some emails on my localdomain for security reasons and the rest must have to relay/send normally. Is there a way to do it?

Thanks in advance (and sorry for my poor english).