8、修改sendmail.cf
vi /etc/sendmail.cf
在档案最后加上以下的内容：
注意：复制/贴上以下内容有时会因为html tag的问题造成sendmail服务无法重新启动，此时可下载完整sendmail.cf范例文件 (右键/另存目标)至本机再复制/贴上至服务器或上传至服务器。
#在M
##### @(#)procmail.m4 8.11 (Berkeley) 5/19/1998 #####
Mprocmail, P=/usr/bin/procmail, F=DFMSPhnu9, S=11/31, R=21/31, T=DNS/RFC822/X-Unix,
A=procmail -f- -Y -m $h $f $u
# (空此行一定要先空tab)
# 在my name for error messages设定的后面加上下面两行
# Avoid host map lookups if address has this pseudo-domain on it CPprocmail
# 在Ruleset 98后面加上下面设定
# Filter all mail through procmail
#
# Strip the pseudo-domain and continue (already gone through the filter)
R$*<@$+.procmail>$* $@ $1<@$2.>$3
R$*<@$+.procmail.>$* $@ $1<@$2.>$3
#
# No pseudo-domain, send to filtering mailer
R$*<@$+.>$* $#procmail $@/etc/procmail/filter.rc $:$1<@$2.procmail>$3
R$*<@$+>$* $#procmail $@/etc/procmail/filter.rc $:$1<@$2.procmail>$3
9、建立过滤档filter.rc
vi /etc/procmail/filter.rc
范例文件内容如下：
LOGFILE=/var/log/procmail.log
NL="
"
LOGABSTRACT=no
POISONED_EXECUTABLES=/etc/procmail/poisoned-files
INCLUDERC=/etc/procmail/html-trap.procmail
:0 # re-send the message
! -oi -f "$@"
