1 Topic by ferry999

  • ferry999
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Topic: How to disable greylisting completely?

==== Required information ====
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============ Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.5-1
- Linux/BSD distribution name and version: Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
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====

Hello, i want to disable greylisting completely, but even after editing
/opt/iredapd/settings.py and removing greylisting like:
plugins = ["reject_null_sender", "reject_sender_login_mismatch", "sql_alias_access_policy"]
it still rejects (some) incoming email: "421 please try again later".
Is there another filter active besides iredapd that i must disable/edit to
disable greylisting completely? I have restarted the server, several times,
but the greylisting continues. Output from
:/opt/iRedAPD-1.9.1/tools# python greylisting_admin.py --list

Status   Sender                             -> Local Account                 
------------------------------------------------------------------------------
disabled @. (anyone)                        -> @. (anyone)                   

When greylisting still was enabled in iredapd/settings.py the message
i received when incoming email was greylisted was:
"Intentional policy rejection, please try again later". The message I
receive now (with iredapd greylisting in plugin disabled) is:
"421 please try again later". So i guess another filter is responsible,
what can i do to disable greylisting completely? Many thanks in advance!

----

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: How to disable greylisting completely?

Please show us command output:

postconf smtpd_recipient_restrictions

3 Reply by ferry999

  • ferry999
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Re: How to disable greylisting completely?

# postconf smtpd_recipient_restrictions
smtpd_recipient_restrictions = reject_unknown_recipient_domain reject_non_fqdn_recipient reject_unlisted_recipient check_policy_service inet:127.0.0.1:7777 permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_rbl_client zen.spamhaus.org reject_rbl_client bl.spamcop.net reject_rbl_client b.barracudacentral.org

4 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: How to disable greylisting completely?

Your postfix config is fine, also greylisting is completely disabled in iRedAPD.

What's the error/rejection message now?

5 Reply by ferry999

  • ferry999
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Re: How to disable greylisting completely?

Thanks for helping me out ZhangHuangbin!
The message is "421 please try again later", it is different from the greylist message in iRedAPD. Could it be some protection when there's too many concurrent (incoming) connections? Or fail2ban? I've seen many ip/subnets listed by fail2ban in iptables, sshd, could it be it greylists email from ip's listed by fail2ban in iptables?

6 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: How to disable greylisting completely?

I have no idea which software in iRedMail will generate this message. Show us command output "postconf -n" please.

Note: You may want to hide/replace some sensitive info like domain names before pasting.

7 Reply by ferry999

  • ferry999
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Re: How to disable greylisting completely?

# postconf -n
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
allow_percent_hack = no
biff = no
body_checks = pcre:/etc/postfix/body_checks.pcre
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
enable_original_recipient = no
header_checks = pcre:/etc/postfix/header_checks
inet_interfaces = all
inet_protocols = all
lmtp_tls_mandatory_protocols = !SSLv2 !SSLv3
lmtp_tls_protocols = !SSLv2 !SSLv3
mail_owner = postfix
mailq_path = /usr/bin/mailq
message_size_limit = 15728640
mydestination = $myhostname, localhost, localhost.localdomain
mydomain = srv.mydomain.org
myhostname = srv.mydomain.org
mynetworks = 127.0.0.1
myorigin = srv.mydomain.org
newaliases_path = /usr/bin/newaliases
postscreen_access_list = permit_mynetworks, cidr:/etc/postfix/postscreen_access.cidr
postscreen_blacklist_action = enforce
postscreen_dnsbl_action = enforce
postscreen_dnsbl_reply_map = texthash:/etc/postfix/postscreen_dnsbl_reply
postscreen_dnsbl_sites = zen.spamhaus.org*3 b.barracudacentral.org*2
postscreen_dnsbl_threshold = 2
postscreen_dnsbl_whitelist_threshold = -2
postscreen_greet_action = enforce
proxy_read_maps = $canonical_maps $lmtp_generic_maps $local_recipient_maps $mydestination $mynetworks $recipient_bcc_maps $recipient_canonical_maps $relay_domains $relay_recipient_maps $relocated_maps $sender_bcc_maps $sender_canonical_maps $smtp_generic_maps $smtpd_sender_login_maps $transport_maps $virtual_alias_domains $virtual_alias_maps $virtual_mailbox_domains $virtual_mailbox_maps $smtpd_sender_restrictions $sender_dependent_relayhost_maps
queue_directory = /var/spool/postfix
recipient_bcc_maps = proxy:mysql:/etc/postfix/mysql/recipient_bcc_maps_user.cf proxy:mysql:/etc/postfix/mysql/recipient_bcc_maps_domain.cf
recipient_delimiter = +
relay_domains = $mydestination proxy:mysql:/etc/postfix/mysql/relay_domains.cf
sender_bcc_maps = proxy:mysql:/etc/postfix/mysql/sender_bcc_maps_user.cf proxy:mysql:/etc/postfix/mysql/sender_bcc_maps_domain.cf
sender_dependent_relayhost_maps = proxy:mysql:/etc/postfix/mysql/sender_dependent_relayhost_maps.cf
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtp-amavis_destination_recipient_limit = 1
smtp_tls_CAfile = $smtpd_tls_CAfile
smtp_tls_loglevel = 1
smtp_tls_mandatory_protocols = !SSLv2 !SSLv3
smtp_tls_note_starttls_offer = yes
smtp_tls_protocols = !SSLv2 !SSLv3
smtp_tls_security_level = may
smtpd_client_restrictions = permit_mynetworks permit_sasl_authenticated reject_rbl_client sbl.spamhaus.org
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:7777
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks permit_sasl_authenticated
smtpd_recipient_restrictions = reject_unknown_recipient_domain reject_non_fqdn_recipient reject_unlisted_recipient check_policy_service inet:127.0.0.1:7777 permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_rbl_client zen.spamhaus.org reject_rbl_client bl.spamcop.net reject_rbl_client b.barracudacentral.org
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/etc/postfix/mysql/sender_login_maps.cf
smtpd_sender_restrictions = reject_unknown_sender_domain reject_non_fqdn_sender reject_unlisted_sender permit_mynetworks permit_sasl_authenticated check_sender_access pcre:/etc/postfix/sender_access.pcre
smtpd_tls_CAfile = /etc/ssl/certs/iRedMail.crt
smtpd_tls_cert_file = /etc/ssl/certs/iRedMail.crt
smtpd_tls_dh1024_param_file = /etc/ssl/dh2048_param.pem
smtpd_tls_dh512_param_file = /etc/ssl/dh512_param.pem
smtpd_tls_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CDC3-SHA, KRB5-DE5, CBC3-SHA
smtpd_tls_key_file = /etc/ssl/private/iRedMail.key
smtpd_tls_loglevel = 1
smtpd_tls_mandatory_protocols = !SSLv2 !SSLv3
smtpd_tls_protocols = !SSLv2 !SSLv3
smtpd_tls_security_level = may
swap_bangpath = no
tls_random_source = dev:/dev/urandom
transport_maps = proxy:mysql:/etc/postfix/mysql/transport_maps_user.cf proxy:mysql:/etc/postfix/mysql/transport_maps_domain.cf
unknown_local_recipient_reject_code = 550
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql/virtual_alias_maps.cf proxy:mysql:/etc/postfix/mysql/domain_alias_maps.cf proxy:mysql:/etc/postfix/mysql/catchall_maps.cf proxy:mysql:/etc/postfix/mysql/domain_alias_catchall_maps.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql/virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql/virtual_mailbox_maps.cf
virtual_minimum_uid = 2000
virtual_transport = dovecot
virtual_uid_maps = static:2000

8 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: How to disable greylisting completely?

ferry999 wrote:

smtpd_client_restrictions = permit_mynetworks permit_sasl_authenticated reject_rbl_client sbl.spamhaus.org
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:7777
smtpd_recipient_restrictions = reject_unknown_recipient_domain reject_non_fqdn_recipient reject_unlisted_recipient check_policy_service inet:127.0.0.1:7777 permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_rbl_client zen.spamhaus.org reject_rbl_client bl.spamcop.net reject_rbl_client b.barracudacentral.org

Cannot figure it out with this setting, you should try to remove some restriction rules (temporarily) for testing.
e.g. the DNSBL services.