I followed the instructions in this posthere's my postfix main.cf

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
append_dot_mydomain = no
readme_directory = no
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
myhostname = 2mm.biz
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = 2mm.biz, 2mm.compute-1.internal, localhost.compute-1.internal, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 54.243.206.201/32
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
luser_relay = ubuntu@localhost
local_recipient_maps =
virtual_alias_domains = 2mm.biz
virtual_alias_maps = hash:/etc/postfix/virtual
#added below for DKIM
milter_default_action = accept
milter_protocol = 2
smtpd_milters=inet:localhost:8891
non_smtpd_milters=inet:localhost:8891
#EOF

And here is my opendkim.conf

Syslog yes
LogWhy yes
UMask 022
UserID opendkim:opendkim
Domain 2mm.biz
KeyFile /etc/opendkim/20121002.private
Selector 20121002
Canonicalization relaxed/simple
Mode sv
#SubDomains no
KeyTable refile:/etc/opendkim/KeyTable
SigningTable refile:/etc/opendkim/SigningTable
ExternalIgnoreList refile:/etc/opendkim/TrustedHosts
InternalHosts refile:/etc/opendkim/TrustedHosts
Socket inet:8891@localhost

I'm only using one domain so I left SubDomains commented out. When I check with it says that there are no domainkeys or DKIM signature. I updated my DNS with my public key. This is on an amazon EC2 64 bit Ubuntu micro instance. I used sendmail command to test the signatures.

I'm to sure where else to look for a solution. Any ideas?

1 Answer

I found my own answer. the messages in /var/log/mail.log were instrumental in tracking down what was wrong. I'm still new to Linux, that was a tough lesson learned.

my problem was that in opendkim.conf I specified settings for:

1. Domian
2. KeyFile
3. Selector

And also

1. KeyTable
2. SigningTable

I removed the tables and the emails were signed from all emails in my domain. That is after i restarted opendkim and postfix.

Your Answer

Sign up or log in

Sign up using Google Sign up using Facebook Sign up using Email and Password Submit

Post as a guest

Post Your Answer Discard

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy