content/blog/mail_server_alpine_postfix_dovecot_tutorial.md: dovecot.logging section

content/blog/mail_server_alpine_postfix_dovecot_tutorial/index.md

@@ -493,7 +493,41 @@ Now let's enable IMAP by editing `/etc/dovecot/dovecot.conf`. Find a `protocols
 protocols = imap
 ```
 
-## Configure how to store emails
+## Logging
+
+By default, Dovecot logs to the syslog (`/var/log/messages`). It would be easier to monitor Dovecot if it logged to its
+own log file, so we'll configure that at `/etc/dovecot/conf.d/10-logging.conf`:
+
+```conf
+log_path = /var/log/dovecot.log
+```
+
+The file also has various settings on logging verbosity you can configure. I set:
+
+```conf
+auth_verbose = yes
+auth_debug = yes
+mail_debug = yes
+```
+
+You should already have an `/etc/logrotate.d/dovecot` file. If not, create it with the following contents:
+
+```logrotate
+/var/log/dovecot*.log {
+    daily
+    missingok
+    copytruncate
+    rotate 7
+    compress
+    notifempty
+    sharedscripts
+    postrotate
+        /etc/init.d/dovecot --quiet --ifstarted reopen
+    endscript
+}
+```
+
+## Configure IMAP and email storage
 
 You probably want to use the Maildir format for storing emails, where each user's mail is stored at `~/Maildir` (this
 can be set to another location if desired).