Implementing DKIM and SPF: Postfix and Slackware
I have two domains: one for business, one for personal. I installed (but not yet activated) opendkim for postfix on my slackware-14.2 server. I have a question on /etc/opendkim.conf (there is no /etc/default/opendkim), and another question on syntax for adding a SPF record in my DNS server.
DKIM:
/etc/opendkim.conf has the work domain entered for Domain and Report address. Do I add a second Domain line with the name of my personal domain?
SPF:
I understand that the syntax, 'v=spf1 mx -all' allows all messages from my DNS MX record to be sent and those from all other domains to be rejected. I think this is the syntax I want since the DNS A record for my personal domain points to the work domain name. So, if I use the syntax of 'v=spf1 a -all' then only messages from my work domain (with the main A record) will be sent and those from my personal domain will be rejected. Am I correct?
I run a sole practitioner professional services business and I'm not a professional network admin so I appreciate learning from all of you who know much more than I do about mail servers and networking.
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