Comment pointed out that this may fix my problem, and it did: Why don't mails show up in the recipient's mailspool?

I use Postfix with Dovecot, and when I send an email from my gmail to my server, it is received at the server, but not at my email client using POP3. I can verify it being received at the server using the mail command.

This is my main.cf:

queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
myhostname = tom4u.eu
myorigin = $myhostname
inet_interfaces = all
inet_protocols = all
unknown_local_recipient_reject_code = 550
relay_domains = $mydomain
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
     PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
     ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.6.6/samples
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
smtpd_tls_cert_file = /etc/postfix/certs/cert.pem
milter_protocol = 2
milter_default_action = accept
smtpd_milters = inet:localhost:8891
non_smtpd_milters = inet:localhost:8891
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
smtpd_recipient_restrictions = reject_non_fqdn_recipient,permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination,permit
broken_sasl_auth_clients = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth

If you could help me with this, I'd be most grateful, if you need any more information, please ask.

var/log/maillog:

May 30 22:44:25 tom4u postfix/smtpd[18626]: connect from mail-we0-f181.google.com[74.125.82.181]
May 30 22:44:25 tom4u postfix/smtpd[18626]: 318F679B7F: client=mail-we0-f181.google.com[74.125.82.181]
May 30 22:44:25 tom4u postfix/cleanup[18631]: 318F679B7F: message-id=<CAA_0zdxY-WUFGOC57K_yVn0G+5hN=8KSXuohJqMDB5Rm7bqu8w@mail.gmail.com>
May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: mail-we0-f181.google.com [74.125.82.181] not internal
May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: not authenticated
May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: DKIM verification successful
May 30 22:44:25 tom4u opendkim[15006]: 318F679B7F: s=20120113 d=gmail.com SSL
May 30 22:44:25 tom4u postfix/qmgr[16282]: 318F679B7F: from=<[email protected]>, size=1720, nrcpt=1 (queue active)
May 30 22:44:25 tom4u postfix/smtpd[18626]: disconnect from mail-we0-f181.google.com[74.125.82.181]
May 30 22:44:25 tom4u postfix/local[18632]: 318F679B7F: to=<[email protected]>, relay=local, delay=0.17, delays=0.12/0.01/0/0.03, dsn=2.0.0, status=sent (delivered to mailbox)
May 30 22:44:25 tom4u postfix/qmgr[16282]: 318F679B7F: removed
May 30 22:45:32 tom4u dovecot: pop3-login: Login: user=<tom>, method=PLAIN, rip=SNIP, lip=176.31.127.165, mpid=18679
May 30 22:45:32 tom4u dovecot: pop3(tom): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
May 30 22:46:32 tom4u dovecot: pop3-login: Login: user=<tom>, method=PLAIN, rip=SNIP, lip=176.31.127.165, mpid=18725
May 30 22:46:32 tom4u dovecot: pop3(tom): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0