I modify the file, and maillog shows:
Sep 24 08:51:37 web2 dovecot: Dovecot v1.0.7 starting up
Sep 24 08:52:22 web2 dovecot: Killed with signal 15
Sep 24 08:52:22 web2 dovecot: Dovecot v1.0.7 starting up
Sep 24 09:00:54 web2 postfix/smtpd[4835]: connect from unknown[92.81.200.146]
Sep 24 09:00:54 web2 postfix/smtpd[4835]: C3DE811CB942: client=unknown[92.81.200.146], sasl_method=PLAIN, sasl_username=office@company.com
Sep 24 09:00:55 web2 postfix/cleanup[4839]: C3DE811CB942: message-id=embdadd627-dd01-41d4-b0dc-d56f51e67815@admin-pc
Sep 24 09:00:55 web2 postfix/qmgr[2506]: C3DE811CB942: from=office@company.com, size=1480, nrcpt=1 (queue active)
Sep 24 09:00:55 web2 postfix/error[4840]: C3DE811CB942: to=BOUNCE@company.com, orig_to=user1@company.com, relay=none, delay=0.33, delays=0.3/0/0/0.02, dsn=5.0.0, status=bounced (User unknown in virtual alias table)
Sep 24 09:00:55 web2 postfix/cleanup[4839]: 1315711CB947: message-id=20100924060055.1315711CB947@web2.company.com
Sep 24 09:00:55 web2 postfix/qmgr[2506]: 1315711CB947: from=<>, size=3322, nrcpt=1 (queue active)
Sep 24 09:00:55 web2 postfix/bounce[4841]: C3DE811CB942: sender non-delivery notification: 1315711CB947
Sep 24 09:00:55 web2 postfix/qmgr[2506]: C3DE811CB942: removed
Sep 24 09:00:55 web2 postfix/error[4840]: 1315711CB947: to=BOUNCE@company.com, orig_to=office@company.com, relay=none, delay=0.01, delays=0/0/0/0, dsn=5.0.0, status=bounced (User unknown in virtual alias table)
Sep 24 09:00:55 web2 postfix/qmgr[2506]: 1315711CB947: removed
Sep 24 09:00:55 web2 postfix/smtpd[4835]: disconnect from unknown[92.81.200.146]
Sep 24 09:04:15 web2 postfix/anvil[4837]: statistics: max connection rate 1/60s for (smtp:92.81.200.146) at Sep 24 09:00:54
Sep 24 09:04:15 web2 postfix/anvil[4837]: statistics: max connection count 1 for (smtp:92.81.200.146) at Sep 24 09:00:54
Sep 24 09:04:15 web2 postfix/anvil[4837]: statistics: max cache size 1 at Sep 24 09:00:54
Sep 24 09:18:26 web2 dovecot: pop3-login: Login: user=office@company.com, method=PLAIN, rip=86.127.164.210, lip=10.241.85.1, TLS
Sep 24 09:18:26 web2 dovecot: pop3-login: Login: user=user@company.com, method=PLAIN, rip=86.127.164.210, lip=10.241.85.1, TLS
Sep 24 09:18:26 web2 dovecot: POP3(office@company.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Sep 24 09:18:26 web2 dovecot: POP3(user@company.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Sep 24 09:22:55 web2 dovecot: pop3-login: Login: user=user@company.com, method=PLAIN, rip=86.127.164.210, lip=10.241.85.1, TLS
Sep 24 09:22:55 web2 dovecot: pop3-login: Login: user=office@company.com, method=PLAIN, rip=86.127.164.210, lip=10.241.85.1, TLS
Sep 24 09:22:56 web2 dovecot: POP3(user@company.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0
Sep 24 09:22:56 web2 dovecot: POP3(office@company.com): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0