smtpguard Ȥϡ
smtp ήƤ᡼Ǥ褦˼줿ġǤ
ISP Υˡ˹碌ƹͤ줿塼Ǥ
ISP Ǥ () Υ桼̤˥᡼뤬Ƥޤ
Ф礭ưƤ뤳ȤϹǤSPAM äꡢ륹줿ꤹ桼⤤ޤ
DSL եФβ®ǤͤȤĤʤäƤϥ᡼륵ФѤ٤ȤʤꡢѼԤ̤Ȥʤޤ

 smtpguard 


Ȥʤѥ
	桼˥ IP ɥ쥹 	᡼ 	

# Υ桼 SPAM ȯ
		
# 륹Ǳ줿ѥ󤫤ȯ
		
#  SPAMMER ȯ
		

־סספθդ嵭ǻȤäƤޤĶˤäự㤤ޤ
ͭѤǤ褦ˤᡢ

# ˥ƥΥȥåץɤϲ//桼
# SPAM ȯȥɤϲ/äȤʤ롩
# ᡼륷ƥä˲̤ޤǽݽ뤫

Ĵɬפޤ
 smtpguard Ūޤɽޤ


SPAM ħȤơդ (INCOMING) ٤ȤʤǤϤʤ OUTGOING ФѤ٤ˤʤޤ
SPAM 褦ȤƤ᡼Τʤ¿Υ᡼뤬Х󥹤ޤ
Х󥹤 queue ίǤϤʤԤإ顼å֤ȤƤ⳰ΥФ³褦ȤॢȤƤޤޤ
ǺǸ˥֥Х󥹤ȯޤॢȤίä塼 OUTGOING ʾ֤ˤʤޤ
Τ SPAM ٤ɤ INCOMING  smtpguard Ѥޤ

smtpguard ϥݥΥեȤȤʤäƤޤ
³ĥ٤ե˽äƥݥȤûƤޤ
SMTP åȤˡ餫줿롼ˤäƥݥȤη׻Ԥsmtpd ݤʤɤŬڤʥԤȤǽȤƤޤ

Ȥ

# ⡼ IP ɥ쥹
# MAIL FROM ޥɤͿ줿ʸ
# RCPT TO ޥɤͿ줿ʸ

嵭ξ򻲾ȤΥ򵯤褦ˤƤޤ
ok
	ۥ磻ȥꥹȤȤư
wait
	ٱ
reject
	
mail
	ٹ᡼
log
	˥åϤ
delete
	ǡ١Υ쥳ɤ

եε

MAILFROM="postmaster@example.com"
SENDMAIL="/usr/sbin/sendmail"
EXPIRE=900

# IPɥ쥹 172.16.3.* ǤСݥȲû롣
A: IP==172.16.3.        : add(1)

# MAIL FROM  example.com ǽäƤʤСݥȲû롣
A: F!~=example.com      : add(1)

# RCPT TO ˤĤݥȲû롣
A:                      : add(1)

# RCPT TO  example.com ǽäƤʤСݥȲû롣
A: T!~=example.com      : add(1)

# RCPT TO 100ۤƤСŪ100ݥȲû롣
R: TC>100               : addlocal(100)

# ݥȤ100ۤƤС
#       o smtpd  "wait 5" ֤
#       o 
R: P>100                : wait(5),
        log( "inserting a small sleep in a SMTP session from " , IP )

# ݥȤ1000ۤƤС
#       o "admin@example.com" ؤηٹ᡼
#       o ǡݻ֤900ñĹ
#       o 
#       o smtpd 饯饤Ȥ "MESSAGE" ֤
R: P>1000               : mail("admin@example.com"),
        extendexpire(900),
        reject("411 mail server temporally rejected message"),
        log("rejecting a SMTP session from ", IP)


smtpguard ϥե쥭֥ǡƥΥˡ˹碌ƤǤޤ

