ISPConfig + Perfect Setup Ubuntu 5.10 + Smtp SPAM problems
HI all guys,
i configured my server a month ago but im havin problems with spam, i just followed all the steps in perfect setup ubuntu 5.10, but anyone can send emails throught smtp without authentification.
For example i telnet to my server to port 25(i tried from an outside ip and it worked).
So when i look to my mail logs, im noticing that some people is using my server to send emails....
anyone could help me?
thks in advanced :-P
First, did you try to send emails to a domain on your server or to an external domain. Your server is only an open relay if someone can send email to e.g. a gmail account without authentication.
Please post your postfix main.cf file here.
What's the output of
this is my output to ehlo :-P, i think its right because is starttls and AUTH...
501 Syntax: EHLO hostname
250-AUTH LOGIN PLAIN
this is my main.cf from /etc/postfix
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
smtpd_banner = $myhostname ESMTP $mail_name
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
myhostname = server1.mydomain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
#mydestination = server1.mydomain.com, localhost.mydomain.com, localhost
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject _unauth_destination
smtpd_tls_auth_only = no
smtp_use_tls = yes
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
home_mailbox = Maildir/
virtual_maps = hash:/etc/postfix/virtusertable
mydestination = /etc/postfix/local-host-names
Did you try to send emails to a domain on your server or to an external domain?
There are three scenarios when you don't have to authenticate when you want to send mails:
thks in advanced :-)
What's in your mail log when yout try to send to an external recipient?
another question this is normal ?
220 server1.example.com ESMTP Postfix
250-AUTH LOGIN PLAIN
mail from: firstname.lastname@example.org
501 Bad address syntax
mail from: email@example.com
501 Syntax: MAIL FROM: <address>
MAIL FROM: TEST@example.com
RCPT TO: firstname.lastname@example.org
554 <email@example.com>: Relay access denied
but when the auth is require? if i dont auth this is the message ?
thks in advanced
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