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A Cloud Guru

Linux Email Services: Configuring IMAP with Dovecot

Most customers enjoy using their own email client to check mail rather than a terminal. To that end, deploying a `dovecot` instance will help them check email and give you the security you need to sleep at night. This lab will help you practice setting up a `dovecot` instance to work with your `postfix` instance.

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Path Info

Level

Beginner

Duration

15m

Published

Sep 18, 2020

Challenge

Install Dovecot

First, you need to install dovecot

yum install dovecot -y

Now edit the required files:

vim /etc/dovecot/conf.d/10-auth.conf
    set up auth_mechanisms
vim /etc/dovecot/conf.d/10-mail.conf
    set up mail_location to match postfix's home_mailbox from /etc/postfix/main.cf
vim /etc/dovecot/conf.d/10-master.conf
    uncomment the auth-userdb unix_listener and configure the Postfix smtp-auth unix_listener

Create the test user:

useradd test_user
passwd test_user
mkdir /home/test_user/Maildir
chown test_user.test_user /home/test_user/Maildir/
chmod -R 700 /home/test_user/Maildir/

Now you can start dovecot:

systemctl start dovecot

Challenge

Test your Dovecot Configuration

First, connect to the dovecot IMAP server:

telnet localhost 143

You'll receive a response similar to:

OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.

a login test_user 1234

If things are set up correctly, you'll receive a response similar to:

OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY SPECIAL-USE] Logged in

Congratulations - you've configured dovecot!

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

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