[Dovecot] n00b here -- pop email deletion

[Glenn English]

I'm running Dovecot IMAP and POP3 on Debian. But it look's like it's keeping mail in the user's inbox on the server until it's deleted by the user. I thought POP servers deleted email as soon as it was downloaded, but apparently not, according to dovecot.org.

Is there something in the Dovecot conf I can do to get rid of all this redundant crud?

I see several conversations on the 'Net about "quotas" that look like they might keep stuff around for a few days or weeks, then delete. That sounds lovely, but I don't understand them enough to try to make it happen. 

dovecot -n:

> # 1.0.15: /etc/dovecot/dovecot.conf
> log_timestamp: %Y-%m-%d %H:%M:%S 
> protocols: imap pop3
> ssl_listen: *
> ssl_disable: yes
> disable_plaintext_auth: no
> login_dir: /var/run/dovecot/login
> login_executable(default): /usr/lib/dovecot/imap-login
> login_executable(imap): /usr/lib/dovecot/imap-login
> login_executable(pop3): /usr/lib/dovecot/pop3-login
> login_max_processes_count: 12
> mail_privileged_group: mail
> mail_executable(default): /usr/lib/dovecot/imap
> mail_executable(imap): /usr/lib/dovecot/imap
> mail_executable(pop3): /usr/lib/dovecot/pop3
> mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
> mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
> mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3
> pop3_uidl_format(default): 
> pop3_uidl_format(imap): 
> pop3_uidl_format(pop3): %08Xu%08Xv
> auth default:
>   mechanisms: plain login
>   passdb:
>     driver: pam
>   userdb:
>     driver: passwd
>   socket:
>     type: listen
>     client:
>       path: /var/spool/postfix/private/auth
>       mode: 432
>       user: postfix
>       group: postfix

-- 
Glenn English