Dear Pat:
Thank you for throwing this idea, because I really thought it wasn't
possible to retrieve docker logs without setup, but I dug and found the
logs. I have them all. Unfortunately, I can't share them all because
they're like GBs in size. Just the grep on that email address is like
750 MB in size.
I cut a snippet of the relevant part (where I see the spam address), and
put it in pastebin. I hope that's allowed in the rules of the list.
https://pastebin.com/PEir7mDc
(all from postfix, nothing from dovecot, btw).
I minimally redacted the logs:
- The domains example.com and example.org belong to me, seems like both
were involved in this attack.
- My public IP address was replaced with 123.456.789.123
Please note that 172.30.0.0/16 is the docker-compose subnet for all
dockerized email applications. It was created automatically by
docker-compose.
If you need any additional information or additional logs, please let me
know.
Best regards,
Sam
On 21/12/2022 10:31 AM, Patrick Proniewski wrote:
Hello,
Do you have the logs (postfix and maybe dovecot) showing the spammer
interaction with the server?
pat
On 21 Dec 2022, at 05:45, Samer Afach <samer.af...@msn.com> wrote:
Thank you, Phil. Here we go. Here's postconf -n:
I hope this helps in better identifying how the spammer was able to use my
server to send a spam email.
```
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
debug_peer_level = 6
debug_peer_list = 0.0.0.0/0
disable_vrfy_command = yes
inet_interfaces = all
inet_protocols = ipv4
mailbox_size_limit = 0
maillog_file = /dev/stdout
message_size_limit = 0
milter_default_action = accept
milter_protocol = 2
mydestination = hostname.hosting-service.com, localhost.hosting-service.com,
localhost
myhostname = localhost
mynetworks_style = subnet
myorigin = localhost
non_smtpd_milters = inet:docker-email-opendkim:12301
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
$smtpd_sender_login_maps
readme_directory = no
recipient_delimiter = +
relay_domains =
relayhost =
smtp_tls_cert_file = /shared-keys/example.com/fullchain.pem
smtp_tls_key_file = /shared-keys/example.com/privkey.pem
smtp_tls_loglevel = 1
smtp_tls_mandatory_protocols = !SSLv2,!SSLv3,!TLSv1,!TLSv1.1
smtp_tls_protocols = !SSLv2,!SSLv3,!TLSv1,!TLSv1.1
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_client_restrictions = permit_mynetworks
smtpd_helo_restrictions = reject_invalid_helo_hostname,
smtpd_milters = inet:docker-email-opendkim:12301
smtpd_recipient_restrictions = check_sender_access
hash:/etc/postfix/sender_access, permit_sasl_authenticated, permit_mynetworks,
reject_unauth_destination, reject_invalid_hostname,
reject_unknown_recipient_domain, reject_unauth_destination, reject_rbl_client
sbl.spamhaus.org, reject_rbl_client b.barracudacentral.org, reject_rbl_client
zen.spamhaus.org, reject_rbl_client truncate.gbudb.net, reject_rbl_client
bl.spamcop.net, reject_rbl_client cbl.abuseat.org,
smtpd_relay_restrictions = permit_sasl_authenticated permit_mynetworks
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = /shared-socks/auth_dovecot
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = proxy:mysql:/etc/postfix/mysql_sender_login_maps.cf
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /shared-keys/example.com/fullchain.pem
smtpd_tls_ciphers = high
smtpd_tls_key_file = /shared-keys/example.com/privkey.pem
smtpd_tls_mandatory_protocols = !SSLv2,!SSLv3,!TLSv1,!TLSv1.1
smtpd_tls_protocols = !SSLv2,!SSLv3,!TLSv1,!TLSv1.1
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /var/vmail/
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_limit = 0
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 104
virtual_transport = lmtp:inet:docker-email-dovecot:10024
virtual_uid_maps = static:5000
```
Best regards,
Sam
On 21/12/2022 8:35 AM, Phil Stracchino wrote:
On 12/20/22 21:39, Samer Afach wrote:
I could share postconf too, but it's huge and I don't want to make this
a huge burden unless necessary.
'postconf -n' is much more concise. Try it.
