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¨Ï¥ÎPostfix TLS¬ð¯}GFW«ÊÂê

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conversation with 111.111.0.0[111.111.0.0] timed out while sending MAIL FROM
lost connection with 111.111.0.0[111.111.0.0] while sending message body
host 111.111.0.0[111.111.0.0] said: 500 error (in reply to MAIL FROM command)
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A. Mail Server»PMUA¤£¦b¦P¤@°ê®a
¹ï¤_¦øªA¾¹»PMUA¤£¦b¦P¤@°ê®a³y¦¨µLªk¥¿±`¨Ï¥ÎPOP3¡BSMTP¦¬¨ú¶l¥óªº±¡ªp¥i¥H±Ä¥Î¥[±KªºWebmail (https)©ÎPOP3s¡BSMTPS¸Ñ¨M¡C

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1).¨Ï¥Î°ê¥~ªº¶l¥óªA°È¡A¤ñ¦photmail¡Agmail¨Óµo°e;
2).¶¶}GFW¡A©ÎªÌ¥[±K³q«H³q¹D¡C¤ñ¦p¨Ï¥ÎSSL¥[±K¡A³s±µ¨ì®ü¥~¶l¥ó¦øªA¾¹¡A¦AÂàµoemail¡C©ÎªÌ¨Ï¥ÎVPN³s±µ¨ì®ü¥~¡A¤Z¬Oµo¥X¥hªºemali¥þ³¡¨«vpn³q¹D¡C
  
¥»¦¸±Ä¥ÎPostfixªºTLS¹ê²{SSL¥[±K³s±µ¨ì®ü¥~¶l¥ó¦øªA¾¹¡A¦AÂàµoemailªº¤è®×¬ð¯}GFWªº«ÊÂê¡A¸g¹ê»ÚÀô¹Ò´ú¸Õ®ÄªG«D±`¦n¡C

1.TLS§t¸q
Transport Layer Security (TLS, formerly called SSL) provides certificate-based authentication and encrypted sessions. An encrypted session protects the information that is transmitted with SMTP mail or with SASL authentication.

2.¨t²Î­n¨D
Postfix 2.3¥H¤W¨Ã¥B½sĶ¤ä«ùTLS

3.¨ãÅé¹ê²{
°²³]²{¦³¨â¥x¦w¸ËpostfixªºMail Server, ¥D¦øªA¾¹¦b°ê¤º (²ºÙCN)¦³°·¥þªº¶l¥ó¦¬µo¥\¯à¡AÂàµoªA°È¦b¥[®³¤j(²ºÙCA)¡A¥B¦U¦Û¾Ö¦³MX°O¿ý»PInternet©TIP¡C

1). Mail flow:
Mail (CN) => yahoo.com => postfix transport_maps (CN) => TLS => postfix (CA) => yahoo.com

2). CN¥D¾÷°t¸m

main.cf:
# relay setting via TLS
transport_maps = hash:/etc/postfix/transport_maps
smtp_tls_policy_maps = hash:/etc/postfix/tls_policy_maps

transport_maps¡J
yahoo.com     smtp:[CA¥D¾÷°ì¦W]

tls_policy_maps¡J
[CA¥D¾÷°ì¦W]     encrypt

postmap /etc/postfix/transport_maps
postmap /etc/postfix/tls_policy_maps


3). CA¥D¾÷°t¸m

main.cf:
# TLS relay config
mydestination = $mynetworks
smtpd_banner = $myhostname TLS enabled $mail_name - by extmail.org
smtpd_tls_security_level = encrypt
smtpd_use_tls = yes
smtpd_tls_auth_only = no
smtp_tls_CAfile = /etc/postfix/tls/smtpd.pem
smtp_tls_cert_file = /etc/postfix/tls/smtpd.pem
smtp_tls_key_file = /etc/postfix/tls/smtpd.pem
smtpd_tls_CAfile = /etc/postfix/tls/smtpd.pem
smtpd_tls_cert_file = /etc/postfix/tls/smtpd.pem
smtpd_tls_key_file = /etc/postfix/tls/smtpd.pem
smtpd_tls_received_header = yes
smtpd_tls_loglevel = 0
smtpd_starttls_timeout = 60s
mynetworks = 127.0.0.1 111.111.0.0 (CA¥D¾÷IP)

4). TLS cert generation (CA)

mkdir /etc/postfix/tls
«Ø¥ßmkcert©Msmtpd.cnf¤å¥ó¡A¤º®e¦p¤U:

mkcert:
# package installation routine.
test -x /usr/bin/openssl || exit 0
prefix="/etc/postfix/tls"
if test -f /etc/postfix/tls/smtpd.pem
then
    echo "$prefix/smtpd.pem already exists."
    exit 1
fi
umask 077
cp /dev/null $prefix/smtpd.pem
chmod 600 $prefix/smtpd.pem
chown root $prefix/smtpd.pem
cleanup() {
    rm -f $prefix/smtpd.pem
    rm -f $prefix/smtpd.rand
    exit 1
}
dd if=/dev/urandom of=$prefix/smtpd.rand count=1 2>/dev/null
/usr/bin/openssl req -new -x509 -days 365 -nodes \
    -config $prefix/smtpd.cnf -out $prefix/smtpd.pem -keyout $prefix/smtpd.pem || cleanup
/usr/bin/openssl gendh -rand $prefix/smtpd.rand 512 >>$prefix/smtpd.pem || cleanup
/usr/bin/openssl x509 -subject -dates -fingerprint -noout -in $prefix/smtpd.pem || cleanup
rm -f $prefix/smtpd.rand


smtpd.cnf:
RANDFILE = /etc/postfix/tls/smtpd.rand
[ req ]
default_bits = 1024
encrypt_key = yes
distinguished_name = req_dn
x509_extensions = cert_type
prompt = no
[ req_dn ]
C=CN
ST=SH
L=ShangHai
O=ExtMail Server
OU=Automatically-generated SMTPD SSL key
CN=localhost
emailAddress=postmaster@extmail.org
[ cert_type ]
nsCertType = server


chmod 755 /etc/postfix/tls/mkcert
./mkcert


¥»°t¸m¸g¹ê»ÚÀô¹Ò´ú¸Õ®ÄªG«D±`¨}¦n,¥»¤¶²Ð¤£¥]§t¶l¥óµo°eªº°ò¥»°t¸m¡A¦p¦³»Ý­n½Ð¬d¾\½×¾Â¬ÛÃö¤å³¹¡C±z¥i¥H¥ô·N¨Ï¥Î»PÂà¸ü¡A¦ý½Ðª`©ú¥X³B:extmail.org¡C
«D±`·PÁÂHZQBBC¦b¾ã­Ó°t¸m¹Lµ{¤¤µ¹»P§Þ³N¤ä«ù¡C
2007-7-12 10:42#1
¬d¬Ý¸ê®Æ  Blog  µoµu®ø®§  Yahoo!  ³»³¡
       


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