From: gabriele (gabrieleriseup.net)
Date: Sat Apr 11 2009 - 12:31:00 CDT

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Hi list!
My postfix used to run together with spamassassin mensioned in
master.cf as -o content_filter=spamassassin.
I have removed spamassassin because spamc and postfix process cleanup
were knocking my server down (swap space at its 80% full).
I suspect it is because an aliases miss configuration.
Looking at logs , not alway but just sometimes i get this:

 Apr 9 22:16:54 mail postfix/error[18713]: 72882266C7: to=<double-
bou...mailsystem.my>, relay=none, delay=72807,
delays=72805/1.6/0/0.14, dsn=4.3.0, status=deferred (mail transport
unavailable)
Apr 9 22:16:54 mail postfix/smtpd[18736]: connect from unknown
[83.211.72.153]
Apr 9 22:16:54 mail postfix/qmgr[17265]: 5FD28265E2: from=<>,
size=5279, nrcpt=1 (queue active)
Apr 9 22:16:54 mail postfix/qmgr[17265]: 51880265FC: from=<>,
size=7673, nrcpt=1 (queue active)
Apr 9 22:16:54 mail postfix/qmgr[17265]: 5F13326553: from=<>,
size=5105, nrcpt=1 (queue active)
Apr 9 22:16:54 mail postfix/qmgr[17265]: 5F9CA26555: from=<>,
size=5110, nrcpt=1 (queue active)

Followeb by an another huge ammount of these:

Apr 9 22:16:54 mail postfix/error[18722]: 7CB632672A:
to=<u...mailsystem.my>, orig_to=<m...mailsystem.my>, relay=none,
delay=72746, delays=72744/1.8/0/0.11, dsn=4.3.0, status=deferred (mail
transport unavailable)

My postconf -n is as follows:

alias_maps = hash:/etc/aliases
append_at_myorigin = yes
append_dot_mydomain = no
biff = no
body_checks = regexp:/etc/postfix/mbl-body-deny
broken_sasl_auth_clients = no
config_directory = /etc/postfix
debug_peer_level = 4
debug_peer_list = 127.0.0.0/8, 10.0.0.0/8, 192.168.1.0/29
default_destination_concurrency_limit = 20
defer_transports = smtp
disable_dns_lookups = yes
disable_vrfy_command = yes
duplicate_filter_limit = 500
header_checks = pcre:/etc/postfix/header_checks.txt
home_mailbox = Maildir/
inet_interfaces = all
inet_protocols = all
local_destination_concurrency_limit = 2
local_header_rewrite_clients = static:all
local_recipient_maps =
mailbox_command =
mailbox_size_limit = 0
maximal_backoff_time = 2000
maximal_queue_lifetime = 3
message_size_limit = 502400000
mime_header_checks = pcre:/etc/postfix/mime_header_checks
minimal_backoff_time = 500
mydestination = $mydomain, remailer.$mydomain, mail.$mydomain, smtp.
$mydomain, pop.$mydomain, www.$mydomain, ns2.$mydomain, argo.
$mydomain, news.$mydomain,localhost
mydomain = $mydomain
myhostname = mail.$mydomain
mynetworks = 127.0.0.0/8 , 192.168.1.0/24, 10.0.0.0/8
mynetworks_style = subnet
notify_classes = 2bounce, bounce, delay, policy, protocol, resource,
software
qmgr_message_active_limit = 10000
qmgr_message_recipient_limit = 10000
queue_run_delay = 500
recipient_delimiter = +
relayhost = [myrelayprovider]:587
smtp_cname_overrides_servername = yes
smtp_sasl_auth_enable = yes
smtp_sasl_mechanism_filter = plain,login
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_tls_security_options =
smtp_tls_CAfile = /etc/postfix/ssl/ca.pem
smtp_tls_cert_file = /etc/postfix/ssl/cert.pem
smtp_tls_enforce_peername = no
smtp_tls_fingerprint_cert_match = 51:20:AA:D3:1C:2B:5E:51:01:78:90:DE:
6F:09:3D:EE:03:CF:69:85
smtp_tls_fingerprint_digest = sha1
smtp_tls_key_file = /etc/postfix/ssl/key.pem
smtp_tls_loglevel = 1
smtp_tls_mandatory_ciphers = high
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = fingerprint
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name
smtpd_error_sleep_time = 0
smtpd_hard_error_limit = 10
smtpd_helo_required = yes
smtpd_history_flush_threshold = 30
smtpd_peername_lookup = no
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = no
smtpd_sasl_authenticated_header = no
smtpd_sasl_local_domain =
smtpd_sasl_path = private/auth
smtpd_sasl_tls_security_options =
smtpd_sasl_type = dovecot
smtpd_soft_error_limit = 8
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_ccert_verifydepth = 0
smtpd_tls_cert_file = /etc/postfix/ssl/cert.pem
smtpd_tls_key_file = /etc/postfix/ssl/key.pem
smtpd_tls_mandatory_ciphers = export
smtpd_tls_received_header = no
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/
smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
soft_bounce = no
strict_rfc821_envelopes = yes
tls_random_exchange_name = ${data_directory}/prng_exch
tls_random_source = dev:/dev/urandom
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550

Thank you for the help .

Gabriele
--
sec 1024D/5C5BE409 2009-04-09
      Key fingerprint = 2BDE 5361 39EA 3E75 9EE8 6724 CE20 F80F 5C5B E409
uid Gabriele (Gab at Riseup.Net) <gabrieleriseup.net>
uid [jpeg image of size 1965]
ssb 4096g/078F3AAD 2009-04-09

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