=== Assigning Responsibility Specifying Which Domains that Mail Messages are Delivered===

The default job of an '''SMTP ''' server is to forward the message recieved received to another email server. That's what we've set up We performed that step in the previous lab: in other words, your postfix MTA receives an email from your client MUA (Thunderbird) and forwards it to the destination '''SMTP ''' server. The other thing an SMTP server can be configured to do is receive email. It still uses SMTP but instead of forwarding it to another SMTP server it will forward it to the Local Delivery Agent (LDA).

With postfix The other thing an SMTP server can be configured to do is receive email. Your SMTP server, in this case, forwards the received mail message to <u>another</u> SMTP server, which in turn, forwards it to the Local Delivery Agent (LDA). This is done using postfix by setting the '''mydestination''' parameter (configuration variable ) to include '''$mydomain''' (this is assuming you've set up '''mydomain''', '''myorigin''' , and '''inet_interfaces''' the same way as in the previous lab).