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Enterprise gateways' spam modules can use things like SPF results (Hard Fail/Soft Fail/Temp Error/Perm Error) to dictate a certain spam score, but that is usually custom.
What is seen is that implementing DMARC (succesfully) absolutely improves deliverability, particularly at consumer ISPs.
The former CISO of HMRC wrote a public piece the other day saying how, as well as blocking over half a billion phishing emails, their deliverability of legitimate email went from 18% to 98%.
Not all enterprise gateways are checking DMARC yet, which is part of the battle. However, when they do, they can use a successful result to bypass certain spam or filtering modules.
Why do you ask?
stevo_com-
1 - thanks for considered response so quickly
Brief summary of situation. We are a small business and muggins here is responsible for IT among other things, I am no more than a knowledgeable amateur though so I just manage providers.
Exchange server based in UK and colleagues abroad use outlook client and the HTTP anywhere method to have email connectivity.
Colleague in Malaysia - emails are getting rejected as spam by a recipient company . their implementation of spamtitan is scoring my colleague'e emails 5.5 and therefore blocking them.. This is a problem as its legitimate email traffic.
Doing a bit of digging - our exchange server has SPF but not DKIM or DMARC.
So what I am trying to understand is whether getting our IT supplier to implement DKIM and DMARC solves the problem.
fidbod
One for the DMARC experts
When enterprise spam filters use scoring algorithms to classify an email as spam or otherwise, does the domain having DMARC implemented influence the spam score of an email sent from the domain?
Or to put it another way - does implementing DMARC make my corporate emails appear less spammy?
@stevo_com / @Dammit if you have time to offer a pro's opinion, I would appreciate it.