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mailcow/data/conf/postfix/main.cf

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mailcow dockerized
2016-12-10 03:39:02 +08:00
biff = no
append_dot_mydomain = no
Some last changes
2016-12-13 04:53:58 +08:00
smtpd_tls_cert_file = /etc/ssl/mail/cert.pem
smtpd_tls_key_file = /etc/ssl/mail/key.pem
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_use_tls=yes
[SOGo] Increase workers count to 20 [Postfix] Add extended TLS header [Web] Increase timeout to 10 for docker API connections [Postfix] Add perl package
2018-04-26 20:06:10 +08:00
smtpd_tls_received_header = yes
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
relayhost =
[Postfix] Fixes #967 (assign correct local network range for mynetworks)
2018-01-28 01:13:35 +08:00
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 [fe80::]/10 [fc00::]/7
mailcow dockerized
2016-12-10 03:39:02 +08:00
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
bounce_queue_lifetime = 1d
broken_sasl_auth_clients = yes
disable_vrfy_command = yes
maximal_backoff_time = 1800s
Update main.cf I was looking into creating a backup mx server for a high availability mailcow setup. It seems that this is not easily done. While researching to find out how long an average SMTP server keeps trying to send to a server that is down I found that RFC 5321 advises at least 4 to 5 days. Mailcow has a custom setup of 1 day, which is very short. The user will be unaware for 5 days that his mail has not been delivered, which can be negative. But I still would like to follow the advice of the RFC. RFC 5321, in section 4.5.4.1, has this to say: Retries continue until the message is transmitted or the sender up; the give-up time generally needs to be at least 4-5 days. It MAY be appropriate to set a shorter maximum number of retries for non-delivery notifications and equivalent error messages than for standard messages. Postfix default is also 5 days: http://www.postfix.org/postconf.5.html https://tools.ietf.org/html/rfc5321#section-4.5.4
2019-06-08 21:10:46 +08:00
maximal_queue_lifetime = 5d
[Postfix] Increase default message size limit to 100 MiB
2018-10-02 04:06:20 +08:00
message_size_limit = 104857600
mailcow dockerized
2016-12-10 03:39:02 +08:00
milter_default_action = accept
milter_protocol = 6
minimal_backoff_time = 300s
plaintext_reject_code = 550
Forwarding hosts in postscreen
2017-04-17 21:42:35 +08:00
postscreen_access_list = permit_mynetworks, cidr:/opt/postfix/conf/postscreen_access.cidr, tcp:127.0.0.1:10027
mailcow dockerized
2016-12-10 03:39:02 +08:00
postscreen_bare_newline_enable = no
postscreen_blacklist_action = drop
postscreen_cache_cleanup_interval = 24h
postscreen_cache_map = proxy:btree:$data_directory/postscreen_cache
postscreen_dnsbl_action = enforce
postscreen_dnsbl_sites = b.barracudacentral.org=127.0.0.2*7 dnsbl.inps.de=127.0.0.2*7 bl.mailspike.net=127.0.0.2*5 bl.mailspike.net=127.0.0.[10;11;12]*4 dnsbl.sorbs.net=127.0.0.10*8 dnsbl.sorbs.net=127.0.0.5*6 dnsbl.sorbs.net=127.0.0.7*3 dnsbl.sorbs.net=127.0.0.8*2 dnsbl.sorbs.net=127.0.0.6*2 dnsbl.sorbs.net=127.0.0.9*2 zen.spamhaus.org=127.0.0.[10;11]*8 zen.spamhaus.org=127.0.0.[4..7]*6 zen.spamhaus.org=127.0.0.3*4 zen.spamhaus.org=127.0.0.2*3 hostkarma.junkemailfilter.com=127.0.0.2*3 hostkarma.junkemailfilter.com=127.0.0.4*1 hostkarma.junkemailfilter.com=127.0.1.2*1 wl.mailspike.net=127.0.0.[18;19;20]*-2 hostkarma.junkemailfilter.com=127.0.0.1*-2
postscreen_dnsbl_threshold = 8
postscreen_dnsbl_ttl = 5m
postscreen_greet_action = enforce
postscreen_greet_banner = $smtpd_banner
postscreen_greet_ttl = 2d
postscreen_greet_wait = 3s
postscreen_non_smtp_command_enable = no
postscreen_pipelining_enable = no
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
proxy_read_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_sender_acl.cf,
[Postfix] Enable/create smtp_tls_policy_maps
2018-10-04 20:34:34 +08:00
proxy:mysql:/opt/postfix/conf/sql/mysql_tls_policy_override_maps.cf,
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
proxy:mysql:/opt/postfix/conf/sql/mysql_sender_dependent_default_transport_maps.cf,
[Postfix] Split SASL passwd maps [Postfix] create new smtp service to skip sender-dependent SASL map [Postfix] Hard-bounce on SASL errors
2018-12-19 16:39:35 +08:00
proxy:mysql:/opt/postfix/conf/sql/mysql_transport_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_sasl_passwd_maps_sender_dependent.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_sasl_passwd_maps_transport_maps.cf,
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
proxy:mysql:/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_sender_bcc_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_bcc_maps.cf,
Expose Postfix's recipient_canonical_maps through web UI
2018-01-24 02:59:06 +08:00
proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_canonical_maps.cf,
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
$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,
$smtpd_sender_login_maps
mailcow dockerized
2016-12-10 03:39:02 +08:00
queue_run_delay = 300s
Remove unused table, rename table
2016-12-19 05:24:22 +08:00
relay_domains = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_relay_domain_maps.cf
mailcow dockerized
2016-12-10 03:39:02 +08:00
relay_recipient_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_relay_recipient_maps.cf
[Web, Postfix, Compose] Allow to add relayhosts per domain (+ plain and login authentication)
2017-07-23 02:39:54 +08:00
sender_dependent_default_transport_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sender_dependent_default_transport_maps.cf
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
Some last changes
2016-12-13 04:53:58 +08:00
smtp_tls_cert_file = /etc/ssl/mail/cert.pem
smtp_tls_key_file = /etc/ssl/mail/key.pem
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtp_tls_loglevel = 1
Add pdns resolver, changed some other files
2016-12-12 01:58:29 +08:00
smtp_dns_support_level = dnssec
smtp_tls_security_level = dane
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_data_restrictions = reject_unauth_pipelining, permit
smtpd_delay_reject = yes
smtpd_error_sleep_time = 10s
smtpd_hard_error_limit = ${stress?1}${stress:5}
smtpd_helo_required = yes
smtpd_proxy_timeout = 600s
When TLS is enforced for incoming mails, allow mynetworks and sasl authenticated users
2017-01-26 02:04:31 +08:00
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, check_recipient_access proxy:mysql:/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf, reject_invalid_helo_hostname, reject_unknown_reverse_client_hostname, reject_unauth_destination
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = inet:dovecot:10001
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_sender_acl.cf
[Postfix/Rspamd] Do not reject unauthenticated sender mismatches but rewrite their subject and assign symbol SPOOFED_SENDER with score 1.0
2017-10-05 05:16:39 +08:00
smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch, permit_mynetworks, permit_sasl_authenticated, reject_unlisted_sender, reject_unknown_sender_domain
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_soft_error_limit = 3
smtpd_tls_auth_only = yes
smtpd_tls_dh1024_param_file = /etc/ssl/mail/dhparams.pem
[Postfix] smtpd_tls_eecdh_grade = auto
2018-07-12 04:10:32 +08:00
smtpd_tls_eecdh_grade = auto
[Postfix] Re-enable TLS 1, 1.1 and some ciphers - real-world tests have shown this setup uses TOO MANY plain text sessions due to compatibility issues
2018-06-26 04:31:23 +08:00
smtpd_tls_exclude_ciphers = ECDHE-RSA-RC4-SHA, RC4, aNULL, DES-CBC3-SHA, ECDHE-RSA-DES-CBC3-SHA, EDH-RSA-DES-CBC3-SHA
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_tls_loglevel = 1
[Postfix] Fix mandatory encryption protocols and always require at least TLS 1.2 for LMTP
2019-03-03 19:11:39 +08:00
[Postfix] Mandatory encryption protocol is now min. TLS 1.2
2019-03-03 19:09:10 +08:00
smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
Change ciphers
2017-01-10 03:22:44 +08:00
smtp_tls_protocols = !SSLv2, !SSLv3
[Postfix] Fix mandatory encryption protocols and always require at least TLS 1.2 for LMTP
2019-03-03 19:11:39 +08:00
[Postfix] Mandatory encryption protocol is now min. TLS 1.2
2019-03-03 19:09:10 +08:00
lmtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
[Postfix] Fix mandatory encryption protocols and always require at least TLS 1.2 for LMTP
2019-03-03 19:11:39 +08:00
lmtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_tls_protocols = !SSLv2, !SSLv3
[Postfix] Fix mandatory encryption protocols and always require at least TLS 1.2 for LMTP
2019-03-03 19:11:39 +08:00
mailcow dockerized
2016-12-10 03:39:02 +08:00
smtpd_tls_security_level = may
[Postfix] Security: Prefer server-side ciphers Prefer server-side ciphers to prevent client-side cipher downgrade. Already enabled in Dovecot.
2018-10-26 05:37:25 +08:00
tls_preempt_cipherlist = yes
Change ciphers
2017-01-10 03:22:44 +08:00
tls_ssl_options = NO_COMPRESSION
[Postfix] Re-enable TLS 1, 1.1 and some ciphers - real-world tests have shown this setup uses TOO MANY plain text sessions due to compatibility issues
2018-06-26 04:31:23 +08:00
smtpd_tls_mandatory_ciphers = high
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
virtual_alias_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_alias_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_spamalias_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_alias_domain_maps.cf,
proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_alias_domain_catchall_maps.cf
mailcow dockerized
2016-12-10 03:39:02 +08:00
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail/
virtual_mailbox_domains = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_domains_maps.cf
[Postfix, Web] Feature: BCC maps
2017-11-19 22:13:43 +08:00
recipient_bcc_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_bcc_maps.cf
sender_bcc_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sender_bcc_maps.cf
Expose Postfix's recipient_canonical_maps through web UI
2018-01-24 02:59:06 +08:00
recipient_canonical_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_recipient_canonical_maps.cf
recipient_canonical_classes = envelope_recipient
Aliases do not match alias domains
2017-03-02 00:59:46 +08:00
virtual_mailbox_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_virtual_mailbox_maps.cf
mailcow dockerized
2016-12-10 03:39:02 +08:00
virtual_minimum_uid = 104
virtual_transport = lmtp:inet:dovecot:24
virtual_uid_maps = static:5000
Switch to Rspamds milter interface
2017-06-07 03:59:44 +08:00
smtpd_milters = inet:rspamd:9900
non_smtpd_milters = inet:rspamd:9900
mailcow dockerized
2016-12-10 03:39:02 +08:00
milter_mail_macros = i {mail_addr} {client_addr} {client_name} {auth_authen}
Add mydestination to prevent hostname == domain situations
2017-01-23 15:23:59 +08:00
mydestination = localhost.localdomain, localhost
Zeyple is not enabled by default
2017-04-10 19:16:40 +08:00
#content_filter=zeyple
Prefere ipv4 to fix problems on v4-only envs
2017-06-19 16:39:14 +08:00
# Prefere IPv4, useful for v4-only envs
smtp_address_preference = ipv4
[Web, Postfix, Compose] Allow to add relayhosts per domain (+ plain and login authentication)
2017-07-23 02:39:54 +08:00
smtp_sender_dependent_authentication = yes
smtp_sasl_auth_enable = yes
[Postfix] Split SASL passwd maps [Postfix] create new smtp service to skip sender-dependent SASL map [Postfix] Hard-bounce on SASL errors
2018-12-19 16:39:35 +08:00
smtp_sasl_password_maps = proxy:mysql:/opt/postfix/conf/sql/mysql_sasl_passwd_maps_sender_dependent.cf
[Web, Postfix, Compose] Allow to add relayhosts per domain (+ plain and login authentication)
2017-07-23 02:39:54 +08:00
smtp_sasl_security_options =
smtp_sasl_mechanism_filter = plain, login
[Postfix] Enable/create smtp_tls_policy_maps
2018-10-04 20:34:34 +08:00
smtp_tls_policy_maps=proxy:mysql:/opt/postfix/conf/sql/mysql_tls_policy_override_maps.cf
[Update] Remove mailcow_anonymize_headers.pcre checks [Postfix] Rename mailcow_anonymize_headers.pcre > anonymize_headers.pcre to prevent collisions
2018-10-24 04:57:38 +08:00
smtp_header_checks = pcre:/opt/postfix/conf/anonymize_headers.pcre
[Postfix] Change mail_name to Postcow and only replace headers when mail_name matches
2018-10-16 16:26:41 +08:00
mail_name = Postcow
[Postfix] Mandatory protocol for authenticated clients over 587/tcp and 465/tcp is now TLSv1.0+ (reverts previous protocol change for authenticated users only) [Postfix] Force route localhost$ over local:
2019-03-06 22:09:28 +08:00
transport_maps = pcre:/opt/postfix/conf/local_transport, proxy:mysql:/opt/postfix/conf/sql/mysql_transport_maps.cf
[Postfix] Split SASL passwd maps [Postfix] create new smtp service to skip sender-dependent SASL map [Postfix] Hard-bounce on SASL errors
2018-12-19 16:39:35 +08:00
smtp_sasl_auth_soft_bounce = no
[Postfix] Do not allow DSN for postscreen
2019-05-28 01:32:41 +08:00
postscreen_discard_ehlo_keywords = silent-discard, dsn