smtpd_timeout = 3600s, why is Plesk so anxious to make that entry in main.cf???

Plesk really likes to have smtpd_timeout = 3600s and smtpd_proxy_timeout = 3600s in its /etc/postfix/main.cf

I don't, so I have both these entries commented out.
The reason for this is that I have Postfix protected with an SMTP-proxy (ASSP). Whenever spam comes in it will, in real time, break the...

smtpd_timeout = 3600s, why is Plesk so anxious to make that entry in main.cf???