We are using sendmail for our main email server, but we would like to be able to forward emails for subdomains to internal departmental mail servers. For example, our sendmail server receives all mail for domain.com. But we would like it to also receive mail for sub1.domain.com and sub2.domain.com. And then we would like it to forward mail for these domains to different internal mail servers. How would we set this up? Would we use mailers? Any help and direction would be appreciated.