[Resolved] Open relay

I have installed Virtualmin 3.99 on Debian 6.0
Using Postfix 2.7.1, default settings.
My server is using as open relay, how I can disable it?

Please, help me, I have stopped postfix and don’t know what to do.
Much thanks!

Main.cfg (domain.com for example):

See /usr/share/postfix/main.cf.dist for a commented, more complete version

Debian specific: Specifying a file name will cause the first

line of that file to be used as the name. The Debian default

is /etc/mailname.

#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

appending .domain is the MUA’s job.

append_dot_mydomain = no

Uncomment the next line to generate “delayed mail” warnings

#delay_warning_time = 4h

readme_directory = no

TLS parameters

smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for

information on enabling SSL in the smtp client.

myhostname = domain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = Debian-60-squeeze-64-minimal, domain.com, localhost.com, localhost

mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME
mailbox_size_limit = 0
recipient_delimiter = +
virtual_alias_maps = hash:/etc/postfix/virtual
sender_bcc_maps = hash:/etc/postfix/bcc
home_mailbox = Maildir/
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
allow_percent_hack = no


I don’t see anything there that appears to make your server an open relay… what symptoms are you seeing that make it appear to be an open relay?


Thanks for unswer.
Seems, that one of the sites was hacked.
When I disable it, spamming is stoping.
Could you help, how can I determine, which script is sending mail?
And one more question, how can I limit mail sending per hour, for example 5 mails/hour.


Please see http://www.virtualmin.com/node/12567

You cannot put limits on individual virtual servers; only on the system server.
(that I know of)