I was told to increase pop3 timeout because mail with big attachment (more than 10 MB) got stuck for more than 10 hours on antispam server. Which setting shoult I increase on ZCS NE 8.0.4?

Code:
$ postconf | grep -i timeout
connection_cache_protocol_timeout = 5s
daemon_timeout = 18000s
ipc_timeout = 3600s
lmtp_connect_timeout = 0s
lmtp_data_done_timeout = 600s
lmtp_data_init_timeout = 120s
lmtp_data_xfer_timeout = 180s
lmtp_lhlo_timeout = 300s
lmtp_mail_timeout = 300s
lmtp_quit_timeout = 300s
lmtp_rcpt_timeout = 300s
lmtp_rset_timeout = 20s
lmtp_starttls_timeout = 300s
lmtp_tls_session_cache_timeout = 3600s
lmtp_xforward_timeout = 300s
milter_command_timeout = 30s
milter_connect_timeout = 30s
milter_content_timeout = 300s
postscreen_upstream_proxy_timeout = 5s
postscreen_watchdog_timeout = 10s
qmgr_daemon_timeout = 1000s
qmgr_ipc_timeout = 60s
qmqpd_timeout = 300s
smtp_connect_timeout = 30s
smtp_data_done_timeout = 600s
smtp_data_init_timeout = 120s
smtp_data_xfer_timeout = 180s
smtp_helo_timeout = 300s
smtp_mail_timeout = 300s
smtp_quit_timeout = 300s
smtp_rcpt_timeout = 300s
smtp_rset_timeout = 20s
smtp_starttls_timeout = 300s
smtp_tls_session_cache_timeout = 3600s
smtp_xforward_timeout = 300s
smtpd_policy_service_timeout = 100s
smtpd_proxy_timeout = 100s
smtpd_starttls_timeout = ${stress?10}${stress:300}s
smtpd_timeout = ${stress?10}${stress:300}s
smtpd_tls_session_cache_timeout = 3600s
smtpd_upstream_proxy_timeout = 5s
tlsproxy_tls_session_cache_timeout = $smtpd_tls_session_cache_timeout
tlsproxy_watchdog_timeout = 10s
trigger_timeout = 10s