Fixing SMTP mail error 452 4.3.1 Insufficient system storage
Posted: Wed Dec 21, 2011 9:06 pm
If you get this error message when you try to send an email, this is probably due to lack of disk space in the disk where /var folder is assigned. Normally your Postfix folder is in /var/spool/postfix.
You can take disk availability with following command.
For postfix, to get current configuration, type the following command.
Sample output:
Notice the setting message_size_limit = 30720000.
It is required to have 1.5 x message_size_limit of free disk space.
So if you are lacking disk space, you have two options.
You can take disk availability with following command.
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df -h
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postconf -n
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alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
html_directory = /usr/share/doc/postfix/html
mailbox_size_limit = 1048576000
message_size_limit = 30720000
mydestination = muttley.vps.bitfolk.com, localhost, localhost.localdomain
myhostname = muttley.vps.bitfolk.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
queue_minfree = 0
readme_directory = /usr/share/doc/postfix
recipient_delimiter = +
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_delay_reject = yes
smtpd_error_sleep_time = 4h
smtpd_hard_error_limit = 20
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname, permit
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_rbl_client sbl.spamhaus.org, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_non_fqdn_sender, reject_unknown_sender_domain, permit
smtpd_soft_error_limit = 10
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_transport = dovecot
virtual_uid_maps = static:5000
It is required to have 1.5 x message_size_limit of free disk space.
So if you are lacking disk space, you have two options.
- Reduce the message_size_limit using the following command.
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postconf -e "message_size_limit = 30720000"
- Assign mail folder to a disk with more space.