==== ==== Required information ====
- iRedMail version: 0.8.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: FreeBSD
- Related log if you're reporting an issue:
====

The first block is generated wrong:

# Use your real hostname to replace 'porcupine.org'.
#if /^Received:/
#/^Received: +from +(porcupine\.org) +/
#    reject forged client name in Received: header:
#/^Received: +from +[^ ]+ +\(([^ ]+ +[he]+lo=|[he]+lo +)(porcupine\.org)\)/
#    reject forged client name in Received: header:
#/^Received:.* +by +(porcupine\.org)\b/
#    reject forged mail server name in Received: header:
#endif
#/^Message-ID:.* <!&!/ DUNNO
#/^Message-ID:.*@(porcupine\.org)/
#    reject forged domain name in Message-ID: header:

and should be:

# Do not indent the patterns between "if" and "endif".
if /^Received:/
/^Received: +from +(porcupine\.org) +/
    reject forged client name in Received: header: $1
/^Received: +from +[^ ]+ +\(([^ ]+ +[he]+lo=|[he]+lo +)(porcupine\.org)\)/
    reject forged client name in Received: header: $2
/^Received:.* +by +(porcupine\.org)\b/
    reject forged mail server name in Received: header: $1
endif
/^Message-ID:.* <!&!/ DUNNO
/^Message-ID:.*@(porcupine\.org)/
    reject forged domain name in Message-ID: header: $1

Variables $1 and $2 was supressed.