Hello, I have been trying all methods of setting up Domainkey thru internet for weeks. What I got from Port's 25 authentication service was this :

SPF check: pass 
DomainKeys check: neutral 
DKIM check: pass 
Sender-ID check: pass 
SpamAssassin check: ham 

I cannot get DomainKeys to pass,
this is my TXT Record from DNS settings

mail._domainkey   v=DKIM1; k=rsa; t=y; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDheF8dpdd ...
mail2._domainkey   k=rsa; t=y; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDlvpU8AjVimYAfU5Sy ...
_domainkey   t=y; o=~;

Here's config from /etc/postfix/main.cf

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

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_use_tls=yes
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 = mail.omnipress.co
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = omnipress.co, detheme.com, turus, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = loopback-only

# DKIM
milter_default_action = accept
milter_protocol = 2
smtpd_milters = inet:localhost:8891,inet:localhost:8892
non_smtpd_milters = inet:localhost:8891,inet:localhost:8892
bounce_notice_recipient = rio@omnipress.co

This is config from /etc/default/dk-filter

# Sane defaults: log to syslog
DAEMON_OPTS="-l"
# Sign for example.com with key in /etc/mail/domainkey.key using
# selector '2007' (e.g. 2007._domainkey.example.com)
#DAEMON_OPTS="$DAEMON_OPTS -d example.com -s /etc/mail/domainkey.key -S 2007"
# See dk-filter(8) for a complete list of options
#
# Uncomment to specify an alternate socket
#SOCKET="/var/run/dk-filter/dk-filter.sock" # default
#SOCKET="inet:54321" # listen on all interfaces on port 54321
#SOCKET="inet:12345@localhost" # listen on loopback on port 12345
#SOCKET="inet:12345@192.0.2.1" # listen on 192.0.2.1 on port 12345
SOCKET="inet:8892@localhost"
DAEMON_OPTS="$DAEMON_OPTS -d *.co, *.com -s /etc/mail/domainkey.key -S mail2"

And config from /etc/opendkim.conf

# This is a basic configuration that can easily be adapted to suit a standard
# installation. For more advanced options, see opendkim.conf(5) and/or
# /usr/share/doc/opendkim/examples/opendkim.conf.sample.

# Log to syslog
Syslog         yes
# Required to use local socket with MTAs that access the socket as a non-
# privileged user (e.g. Postfix)
UMask         002

# Sign for example.com with key in /etc/mail/dkim.key using
# selector '2007' (e.g. 2007._domainkey.example.com)
#Domain         example.com
#KeyFile      /etc/mail/dkim.key
#Selector      2007

# Commonly-used options; the commented-out versions show the defaults.
Canonicalization   relaxed/relaxed
Mode         sv
#SubDomains      no
#ADSPDiscard      no
AutoRestart             yes
Background              yes

# Always oversign From (sign using actual From and a null From to prevent
# malicious signatures header fields (From and/or others) between the signer
# and the verifier.  From is oversigned by default in the Debian pacakge
# because it is often the identity key used by reputation systems and thus
# somewhat security sensitive.
OversignHeaders      From

# List domains to use for RFC 6541 DKIM Authorized Third-Party Signatures
# (ATPS) (experimental)

#ATPSDomains      example.com
Domain                *
KeyFile                 /etc/postfix/dkim.key
Selector                mail
SOCKET                  inet:8891@localhost

Can somebody shed me some light ? I'm all lost here...
Any feedback would be greatly appreciated. Thanks.