Setting Up Domain Keys & Sending Unsigned Email

I am having some e-mail delivery issues, so I added SPF records for my domain and I am still seeing issues (I am behind a static IP). Reverse DNS resolves properly, SPF Passes, and I am scoring a -.05 on assasin, so I have decided to start using Jango transactional SMTP to track delivery (they give you access to the smtp logs as well).

My question is, if I set up domain keys on my domain, will emails without the key be marked as unsigned (which is how they are now) or will they be marked as fraudulent and undeliverable?

The transactional emails through Jango will be signed, but individual emails from users using our ISP's smtp server will not and I want to make sure these get through.

Thanks!
CandidochrisAsked:
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PapertripCommented:
My question is, if I set up domain keys on my domain, will emails without the key be marked as unsigned (which is how they are now) or will they be marked as fraudulent and undeliverable?
They will be treated as unsigned unless you have the following policy set in DNS, which states that all mails for the domain are to be signed with DomainKeys
_domainkey.domain.com IN TXT "o=-"

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That being said, instead of using DomainKeys you should be signing with DKIM.
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PapertripCommented:
Hi, has your question been answered?
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Chris BottomleySoftware Quality Lead EngineerCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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