redirecting mail from multiple domains to one domain?

[lano]

Here is the situation.

I'm hosting customer with domain www.domain1.tld
This customer also have domains domain2.tld, domain3.tld and domain4.tld which they are forwarded to www.domain1.tld (co-domain/new and then forward).
Is there any way to forward or redirect all mails from domain2, domain3 and domain4 to domain1 mailbox without creating new sites for those domains?

Thanks, David

[till]

The mail is redirected automatically when you add them as co-domain.