ugly delay with single emails

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ugly delay with single emails

Uwe Galle-2
Hi,

I setup postfix 2.4.5-20.2 on openSUSE 10.3. The first tests show that
emails to the own address are delivered with a delay what is not usual
for our staff. A single email send to the own address is delayed at
least 26 seconds. With our old Windows based mailserver such emails
arrive almost at the same time.

The log shows a lot of qmgr actions until a "qmgr_deliver" action
processed in the same second. After that action there is a gap of 26
seconds without any action. Then postfix/smtpd continues with "connect
from localhost":

44846  netfinity  mail 01:28:33   postfix/smtpd   postfix/smtpd[13002]:
connect from localhost[127.0.0.1]
44836  netfinity  mail 01:28:07   postfix/qmgr     postfix/qmgr[13023]:
qmgr_deliver: site `[127.0.0.1]:10024'

I combed through the postfix documentation delivered with openSUSE but
didn't find something what could explain this or what setting can remove
this delay. I myself only set the debug_peer_list option to a client
address and in the master.cf I added -v to the qmgr daemon.

The following is the output of postconf -n:

alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
debug_peer_list = 192.168.1.40
inet_interfaces = all
mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
message_size_limit = 20971520
mydestination = $myhostname, localhost.$mydomain
mydomain = domestic.de
myhostname = netfinity.$mydomain
mynetworks = 127.0.0.0/8, 192.168.1.0/24
queue_directory = /var/spool/postfix
relayhost =
setgid_group = maildrop
smtpd_recipient_restrictions =
permit_sasl_authenticated,permit_mynetworks,check_relay_domains
smtpd_restriction_classes = local_only
smtpd_sender_restrictions = check_sender_access
mysql:/etc/postfix/ox_externaldomaincheck.cf
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/ssl/certs/eecert.pem
smtpd_tls_key_file = /etc/ssl/private/eekey.pem
tls_random_source = dev:/dev/urandom
virtual_alias_domains = mysql:/etc/postfix/ox_domains.cf
virtual_alias_maps = mysql:/etc/postfix/ox_user_aliases.cf,
mysql:/etc/postfix/ox_aliases.cf,
mysql:/etc/postfix/ox_resource_aliases.cf,
mysql:/etc/postfix/ox_group_aliases.cf

--------------------------------------------------------------------------------------------------------------------------------
The following is the master.cf:

smtp    inet    n    -    n    -    -    smtpd
    -o content_filter=smtp-amavis:[127.0.0.1]:10024

pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr -v
#qmgr     fifo  n       -       n       300     1       oqmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       n       -       -       smtp
    -o content_filter=amavisfeed:[127.0.0.1]:10024
amavisfeed unix    -       -       n       -       2     lmtp
    -o smtp_data_done_timeout=1200
    -o smtp_send_xforward_command=yes
    -o disable_dns_lookups=yes
    -o max_use=20
127.0.0.1:10025    inet    n    -    n    -    -    smtpd
    -o content_filter=procmail:spamcheck
    -o local_recipient_maps=
    -o relay_recipient_maps=
    -o smtpd_restriction_classes=
    -o smtpd_delay_reject=no
    -o smtpd_client_restrictions=permit_mynetworks,reject
    -o smtpd_helo_restrictions=
    -o smtpd_sender_restrictions=
    -o smtpd_recipient_restrictions=permit_mynetworks,reject
    -o mynetworks_style=host
    -o mynetworks=127.0.0.0/8
    -o strict_rfc821_envelopes=yes
    -o smtpd_error_sleep_time=0
    -o smtpd_soft_error_limit=1001
    -o smtpd_hard_error_limit=1000
    -o smtpd_client_connection_count_limit=0
    -o smtpd_client_connection_rate_limit=0
    -o
receive_override_options=no_header_body_checks,no_unknown_recipient_checks
smtps    inet    n    -    n    -    -    smtpd
    -o smtpd_tls_wrappermode=yes
    -o content_filter=smtp-amavis:[127.0.0.1]:10024
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       n       -       -       smtp
    -o fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
#localhost:10025 inet    n    -    n    -    -    smtpd -o content_filter=
scache      unix    -    -    n    -    1    scache

maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
cyrus      unix    -    n    n    -    -    pipe
  user=cyrus argv=/usr/lib/cyrus/bin/deliver -e -r ${sender} -m
${extension} ${user}
uucp      unix    -    n    n    -    -    pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail
($recipient)
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop
$recipient
procmail    unix    -    n    n    -    5    pipe
    flags=R user=nobody argv=/usr/bin/procmail -t -m
/opt/open-xchange/etc/admindaemon/procmailrc ${sender} ${user} ${recipient}
retry     unix  -       -       n       -       -       error
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
#smtp-amavis
smtp-amavis    unix    -    -    n    -    2    smtp
    -o smtp_data_done_timeout=1200
    -o smtp_send_xforward_command=yes
    -o disable_dns_lookups=yes
    -o max_use=20

Help is very appreciated.

Regards,
Uwe
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Re: ugly delay with single emails

Wietse Venema
> The log shows a lot of qmgr actions until a "qmgr_deliver" action
> processed in the same second. After that action there is a gap of 26
> seconds without any action. Then postfix/smtpd continues with "connect
> from localhost":

You have a bad content filter.

        Wietse