Many mailservers consider that mails sent from a DSL/cable IP are spams.
If you want to avoid this, you need to use a smarthost : your ZCS server forwards all outgoing mail to a server that stands on the Internet (not at the end of a DSL line) and this server sends the mails to the destination servers.
This way, the destination servers see the mails arriving from a "nice" server and do not tag it spam. |