postfix RPMs in Mandrake 10.0

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I set up a machine with Mandrake 10.0 Official and the postfix RPMs for=20
Mandrake. I was surprised to see the following in the systems security=20
email since I hadn't set up any content filter.

tcp 0 0 localhost:10026 *:* LISTEN 3801/mas=
ter =20

A look at master.cf revealed the following:

##### START OF CONTENT FILTER CUSTOMIZATIONS #####
# Please see the Postfix FILTER_README for details.
# These sample entries expect your content filter to
# listen on port 10025 and to inject mail back into
# postfix on port 10026.
#=20
# to enable such content filter run the command
# postconf -e content_filter=3Dsmtp-filter:127.0.0.1:10025
# postconf -e smtp-filter_destination_concurrency_limit=3D2
# or
# postconf -e content_filter=3Dlmtp-filter:127.0.0.1:10025
# postconf -e lmtp-filter_destination_concurrency_limit=3D2
# and the command
# postconf -e receive_override_options=3Dno_address_mappings
#

127.0.0.1:10026 inet n - y - - smtpd
-o content_filter=3D
-o smtpd_restriction_classes=3D
-o smtpd_client_restrictions=3D
-o smtpd_helo_restrictions=3D
-o smtpd_sender_restrictions=3D
-o smtpd_recipient_restrictions=3Dpermit_mynetworks,r eject
-o mynetworks=3D127.0.0.0/8
-o mynetworks_style=3Dhost
-o strict_rfc821_envelopes=3Dyes
-o=20
receive_override_options=3Dno_unknown_recipient_ch ecks,no_header_body_checks
-o smtpd_client_connection_limit_exceptions=3D127.0.0 .0/8

lmtp-filter unix - - y - - lmtp
-o lmtp_data_done_timeout=3D1200
-o disable_dns_lookups=3Dyes

smtp-filter unix - - y - - smtp
-o smtp_data_done_timeout=3D1200
-o disable_dns_lookups=3Dyes

##### END OF CONTENT FILTER CUSTOMIZATIONS #####

My instinct is to comment out the latter portion, but then, I'm naturally=20
paranoid. Is there any potential security hazard in leaving this?
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BOFH excuse #421:

Domain controller not responding
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