Yahoo Spam (POSTFIX)

[le-franke]

Hi, I have a huge problem getting my smtp-server through the Yahoo spam-filter.
I've made SPF-record, Reverse lookups and A-records, but it still not getting through. I am using a Postfix server on Ubuntu. Is there someone who can help me?

Main.cf looks like this:

# 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 (Ubuntu)
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

# TLS parameters
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_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 = mail01.mydomain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = mail01.mydomain.com, localhost, localhost.localdomain
relayhost =
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_mailbox_base = /home/vmail
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination

# how long to wait when servers connect before receiving rest of data
smtp_helo_timeout = 60s
# require proper helo at connections
smtpd_helo_required = yes
# waste spammers time before rejecting them
smtpd_delay_reject = yes
disable_vrfy_command = yes


transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_create_maildirsize = yes
virtual_mailbox_extended = yes
virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = "The user you are trying to reach is over quota."
virtual_overquota_bounce = yes
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 $virtual_mailbox_limit_maps

I get this result when I am running the mail relay test on ping.eu

requires HELO YES
allows VRFY username verification NO
allows EXPN forwarding expansion NO
allows bogus From: header YES
allows simple mail relaying NO
may allow UUCP mail relaying NO
allows other mail relaying NO
can mail to postmaster NO
can mail to webmaster NO
can mail to abuse (RFC 2142) NO

[jledhead]

what happens (whats in the logs) when you connect to yahoo mail servers?

[le-franke]

Trying 206.190.59.120...
Connected to mta304.mail.re4.yahoo.com.
Escape character is '^]'.
421 Message from (195.184.123.11 temporarily deferred - 4.16.50. Please refer to 421 Message temporarily deferred - [numeric code] - Mail
Connection closed by foreign host.

[jledhead]

Trying 206.190.59.120...
Connected to mta304.mail.re4.yahoo.com.
Escape character is '^]'.
421 Message from (195.184.123.11 temporarily deferred - 4.16.50. Please refer to 421 Message temporarily deferred - [numeric code] - Mail
Connection closed by foreign host.

it looks like you have valid dns and ptr, so maybe check this
421 Message temporarily deferred - [numeric code] - Mail