I'm seeing a not-enough free space error with the log entry showing
900+ gigabytes in that line. But on a 10/100 network with a couple
seconds at most between the client sending and postfix logging the
error it seems impossible for that much data to have been sent.
This isn't a public email server; I'm scanning documents to email and
using Postfix to pipe them into handler scripts that strip off the
attachments and deliver them into designated directories based on
address. That's why the message size limit is absurdly high.
When I asked on IRC in #postfix they suggested I should email the info
to this list. The guess was a large integer wrap-around issue of some
kind. Logs & postconfs follow:
Logs:
Mar 24 09:32:13 steve postfix/smtpd[30459]: NOQUEUE: reject: MAIL from
unknown[10.2.2.11]: 452 4.3.1 Insufficient system storage; proto=SMTP
helo=<KMA26A97.ios.local>
Mar 24 09:32:13 steve postfix/smtpd[30459]: warning: not enough free
space in mail queue: 908328873984 bytes < 1.5*message size limit
postconf -nf:
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
inet_interfaces = all
inet_protocols = ipv4
mailbox_size_limit = 0
message_size_limit = 10240000000
mydestination = steve, localhost.localdomain, localhost
myhostname = steve
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.2.2.0/24
10.22.22.0/24
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relayhost = [redacted]:submission
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_tls_security_options = noanonymous
smtp_tls_security_level = encrypt
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated
defer_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
postconf -Mf:
smtp inet n - - - - smtpd
pickup unix n - - 60 1 pickup
cleanup unix n - - - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - - - - smtp
relay unix - - - - - smtp
showq unix n - - - - showq
error unix - - - - - error
retry unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
maildrop unix - n n - - pipe flags=DRhu
user=vmail argv=/usr/bin/maildrop -d ${recipient}
uucp unix - n n - - pipe flags=Fqhu
user=uucp argv=uux -r -n -z -a$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=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe flags=R
user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop}
${user} ${extension}
mailman unix - n n - - pipe flags=FR
user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop}
${user}
