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→MTA and LDA for Receiving Email
If you haven't already done it - set up an MX record in your DNS server to make vm2.yoursenecaid.org the server responsible for receiving emails for anyuser@yoursenecaid.org
== MTA for Receiving Email == == Assigning Responsibility == The default job of an SMTP server is to forward the message recieved to another email server. That's what we've set up in the previous lab: your postfix receives an email from your client (Thunderbird) and forwards it to the destination 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 this is done by setting the '''mydestination''' configuration variable to include '''$mydomain''' (this is assuming you've set up '''mydomain''' and '''myorigin''' in the previous lab). Edit your /etc/postfix/main.cf file and scroll down to (or search for Receiving Email ) '''mydestination'''. Set it up to look like this: <pre>mydestination = $mydomain, $myhostname, localhost.$mydomain, localhost</pre> Now even though your machine's name is vm2.yoursenecaid.org - your postfix will also receive emails for yoursenecaid.org == LDA ==
Postfix is capable of performing the function of an LDA but it has limited configurability, and is generally not used for that purpose. Currently the most popular LDA is LMTP but we'll use dovecot-lda because it's also pretty popular and we'll later be setting up Dovecot as an IMAP server. Using the two as a pair will increase the performance of your IMAP server.