1 (edited by kmihalj 2014-12-01 22:17:09)

Topic: Relay ?!?

==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: CentOS 6.6
- Related log if you're reporting an issue:
====

Hi !

I have warning that someone sending SPAM from iredmail server....

I suspect that someone is using my server as mail relay... how to disable this ?!?
I set that SMTP must be authenticated...

on Pro panel everything looks OK, .... but on mailog i have lot's of messages like this:

Nov 30 11:25:21 iredmail amavis[5780]: (05780-08) Passed CLEAN {RelayedInternal}, MYUSERS LOCAL [1.175.125.187]:51265 [1.175.125.187] <nvlahoxxx@efzg.hr> -> <curtisw@slcs.us>, Queue-ID: 66383E62042E, Message-ID: 2fa11075cf7e$001e36e0$d2971504$@efzg.hr>, mail_id: tbxWCL3cfnNf, Hits: -11.898, size: 4263, queued_as: E2718E6202D1,
dkim_new=dkim:efzg.hr, 929 ms
Nov 30 11:25:21 iredmail amavis[5039]: (05039-19) Passed CLEAN {RelayedInternal}, MYUSERS LOCAL [1.175.125.187]:51265 [1.175.125.187] <nvlahoxxx@efzg.hr> -> <sandy1128us@outlook.com>, Queue-ID: 66383E62042E, Message-ID: <2fa11075cf7e$001e36e0$d2971504$@efzg.hr>, mail_id: bOGNHqtXWSZc, Hits: -11.898, size: 4263, queued_as:
E695CE620432, dkim_new=dkim:efzg.hr, 874 ms

etc...

... HOW to prevent sending such mails ?!?

----

Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.

2

Re: Relay ?!?

*) Please show us "postconf -n".
*) Show us FULL log in /var/log/maillog of this smtp session, starts with 'connect from xx.xx.x.xx', ends with 'disconnect from xx.xx.xx.xx'.

3

Re: Relay ?!?

Postconf -n is here, and in attachment is full maillog from Nov 30 when all started[

[root@iredmail ~]# postconf -n
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
allow_min_user = no
allow_percent_hack = no
biff = no
bounce_queue_lifetime = 4h
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/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
delay_warning_time = 0h
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
enable_original_recipient = no
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
mail_owner = postfix
mailbox_command = /usr/libexec/dovecot/deliver
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
maximal_backoff_time = 4000s
maximal_queue_lifetime = 4h
message_size_limit = 15728640
minimal_backoff_time = 300s
mydestination = $myhostname, localhost, localhost.localdomain, localhost.$myhostname
mydomain = efzg.hr
myhostname = iredmail.efzg.hr
mynetworks = 127.0.0.0/8
mynetworks_style = host
myorigin = iredmail.efzg.hr
newaliases_path = /usr/bin/newaliases.postfix
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
queue_directory = /var/spool/postfix
queue_run_delay = 300s
readme_directory = /usr/share/doc/postfix-2.11.0/README_FILES
recipient_bcc_maps = proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/recipient_bcc_maps_domain.cf
recipient_delimiter = +
relay_domains = $mydestination, proxy:ldap:/etc/postfix/ldap/relay_domains.cf
sample_directory = /usr/share/doc/postfix-2.11.0/samples
sender_bcc_maps = proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_user.cf, proxy:ldap:/etc/postfix/ldap/sender_bcc_maps_domain.cf
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp-amavis_destination_recipient_limit = 1
smtp_data_init_timeout = 240s
smtp_data_xfer_timeout = 600s
smtp_tls_CAfile = $smtpd_tls_CAfile
smtp_tls_loglevel = 0
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = may
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:10031
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, check_helo_access pcre:/etc/postfix/helo_access.pcre
smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unlisted_recipient, check_policy_service inet:127.0.0.1:7777, check_policy_service inet:127.0.0.1:10031, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_path = private/dovecot-auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:ldap:/etc/postfix/ldap/sender_login_maps.cf
smtpd_sender_restrictions = permit_mynetworks, reject_sender_login_mismatch, permit_sasl_authenticated
smtpd_tls_CAfile = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/pki/tls/certs/iRedMail_CA.pem
smtpd_tls_key_file = /etc/pki/tls/private/iRedMail.key
smtpd_tls_loglevel = 0
smtpd_tls_security_level = may
swap_bangpath = no
tls_random_source = dev:/dev/urandom
transport_maps = proxy:ldap:/etc/postfix/ldap/transport_maps_user.cf, proxy:ldap:/etc/postfix/ldap/transport_maps_domain.cf
unknown_local_recipient_reject_code = 550
virtual_alias_domains =
virtual_alias_maps = proxy:ldap:/etc/postfix/ldap/virtual_alias_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_maps.cf, proxy:ldap:/etc/postfix/ldap/virtual_group_members_maps.cf, proxy:ldap:/etc/postfix/ldap/catchall_maps.cf
virtual_gid_maps = static:2000
virtual_mailbox_base = /var/vmail
virtual_mailbox_domains = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:ldap:/etc/postfix/ldap/virtual_mailbox_maps.cf
virtual_minimum_uid = 2000
virtual_transport = dovecot
virtual_uid_maps = static:2000
[root@iredmail ~]# 
Post's attachments

maillog.txt.zip 842.07 kb, 2 downloads since 2014-12-02 

You don't have the permssions to download the attachments of this post.

4

Re: Relay ?!?

*) Could you please paste the log which you're sure it's spam? It's hard for me to figure out which is spam for you.
*) Your postfix config looks fine.