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[postfix-jp: 3273] メールサーバの異常停止



宮尾です
VineLinu4.2 に postfix-2.2.10とcyrus-imapd-2.2.12と
amavisd-new-2.5.2-JPとspamassassin 3.1.8でメールサーバを
構築して運用しています。
2〜3日ほど前から、私の管理しているメールサーバで、
メールの受信が出来なくなってしまいました。
ログを見ると、cannot find your hostname とはかれているのですが
ホストネームは変更していないので、なぜホストネームがないと言われるのか
分かりません。
原因究明を進めているのですが、原因が分かりません。
以下にログを載せるので、ご教授下さい。
[root@community-network log]# more /var/log/maillog (抜粋)
Jan  2 20:48:26 community-network postfix/smtpd[28408]: connect from unknown[203.216.246.65]
Jan  2 20:48:26 community-network postfix/smtpd[28408]: warning: 65.246.216.203.sbl-xbl.spamhaus.org: RBL lookup error: Host or domain name not found. Name service error for name=65.246.216.203.sbl-xbl.spamhaus.org type=A: Host not found, try again
Jan  2 20:48:26 community-network postfix/smtpd[28408]: NOQUEUE: reject: RCPT from unknown[203.216.246.65]: 450 Client host rejected: cannot find your hostname, [203.216.246.65]; from=<****@yahoo.co.jp> to=<****@community-network.jp> proto=SMTP helo=<smtp02.mail.tnz.yahoo.co.jp>
Jan  2 20:48:26 community-network postfix/smtpd[28408]: disconnect from unknown[203.216.246.65]
Jan  2 20:50:55 community-network postfix/anvil[27203]: statistics: max connection rate 3/60s for (smtp:122.214.184.131) at Jan  2 20:47:27
Jan  2 20:50:55 community-network postfix/anvil[27203]: statistics: max connection count 2 for (smtp:203.141.136.6) at Jan  2 20:46:56
Jan  2 20:50:55 community-network postfix/anvil[27203]: statistics: max cache size 3 at Jan  2 20:48:26
Jan  2 20:51:56 community-network postfix/smtpd[28324]: timeout after RSET from unknown[203.141.136.6]
Jan  2 20:51:56 community-network postfix/smtpd[28324]: disconnect from unknown[203.141.136.6]
Jan  2 20:53:01 community-network imap[21395]: open: user miyao opened INBOX
Jan  2 20:53:01 community-network imap[21395]: SQUAT failed to open index file


[root@community-network log]# postconf -n
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases, hash:/var/mailman/data/aliases
allow_percent_hack = no
body_checks = regexp:/etc/postfix/body_checks
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/lib/postfix
debug_peer_level = 2
default_privs = nobody
default_rbl_reply = $rbl_code <$recipient>: Recipient address rejected: User unknown in local recipient table
disable_vrfy_command = yes
header_checks = regexp:/etc/postfix/header_checks
inet_interfaces = all
local_recipient_maps =
mail_owner = postfix
mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
maps_rbl_reject_code = 550
mydestination = $myhostname
mydomain = community-network.jp
myhostname = community-network.jp
mynetworks = 192.168.1.0/24 127.0.0.0/8
myorigin = $mydomain
queue_directory = /var/spool/postfix
smtpd_banner = $mydomain ESMTP unknown
smtpd_client_restrictions = permit_mynetworks, reject_rbl_client sbl-xbl.spamhaus.org, permit
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname, reject_unknown_client, permit
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $mydomain
smtpd_sasl_security_options = noanonymous
smtpd_sender_restrictions = reject_unknown_sender_domain, reject_non_fqdn_sender
strict_rfc821_envelopes = yes
unknown_local_recipient_reject_code = 550

ご指導の程よろしくお願いします。

-- 
Katumi Miyao <miyao@xxxxxxxxxxx>

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Follow-Ups
[postfix-jp: 3274] Re: メールサーバの異常停止, 川部 正和
[postfix-jp: 3278] Re: メールサーバの異常停止, Ko Nonomura

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