LPIC-2 202 E-Mail services

Why is it necessary with Courier to create system aliases?

Courier does not deliver mail to root (for security reasons) and therefore system aliases (at least for root) need to be created.

What is the purpose of using virtual domains?

In order to configure Postfix to handle mail for additional domains besides its own virtual hosts can be added.

What does the bang character (!) mean at the beginning of the last line of a recipe?

It means that the message that matches the previous condition(s) has to be forwarded to another mailbox.

Postfix uses two configuration files: "postfix.cf" and "master.postfix". Correct?

No, those files are: main.cf and master.cf.

What is procmail?

Procmail is a mail filtering utility and is used for pre-processing and sorting incoming mail.

Which is the most common way to implement authentication for Dovecot?

The most common way is using PAM authentication.

Which parameter does Postfix use in order to learn for which domain(s) to receive mail?

The parameter to be used is "mydestination". Multiple domain names can be separated using a whitespace, a comma or both.

Why would you configure and limit the use of the index files using mbox_min_index_size when using Dovecot as a POP3 server?

This is a workaround in order to get updated on deleted mail messages when using mbox instead of maildir.

How can you check whether it is possible to reach a certain SMTP server?

Use "telnet <hostname> 25" and wait for a connected response.

How would you get an overview of all flags that procmail recognizes?

procmail -h