Email Security and Delivery Rates


Email Security and Delivery Rates

Sorry to harp on about something that we have before, but this is getting really important.

Email borne viruses that caused havoc around the world in 2017, are causing email server administrators to look at  security measures to minimise the risk of being spammed and proliferating viruses. This has seen a big increase in the use of DMARC and DKIM key technologies, along with "Senders Reputation" services.

"Yeh, yeh more jargon and so what?" I hear you say!

If you use email, it effects YOU!

If you use email to do your marketing, or to distribute orders, invoices and statements, then it effects you more.  Failure to recognise this will result in lower delivery rates, which will have a knock on effect with your Senders Reputation, and only compound matters.  In short you must make sure that your DNS entries have DMARC and DKIM covered.  If you use PRODOCOM or any other Email Service Provider, then you must make sure that your DNS includes our relevent details as well.

What happens if you do nothing?  If you haven' t covered these off, then your "Senders Reputation" will slowly but surely get eroded and you will start to struggle to get even the basic email from your email client out.  Senders Repuation scores tend not to care about which server is used to send an email, it only looks at YOUR domain.  We are seeing a rapid deployment of DMARC and DKIM and the effects are getting more and more evident.

If an email service provider says "we have SPF and DKIM covered for you, you dont have to do a thing", then they are not entirely correct, only you can cover off DKIM where DMARC is employed.  An email has an outer "packet" that uses the sending mail servers details, including an IP address and a senders email address.  When emails go out from us, this uses one of our ip addresses and our DKIM key.  If the recipeints mail server only looks at this outer "packet" then all the security checks are done on our domain and our DNS entries, so all is good.  However, DMARC looks inside the email and looks to find what the recipient will see as the reply and senders email address, which of course will be yours.  It then does all the lookups on your domain, not ours.  This is where you need our IP address range in your DNS entries.  If you have a DKIM key, then you must list ours as well.  Otherwise security checks will fail, the email won't get delivered and that's one strike against your Senders Reputation.

What can you do?

Use this document called "the Science of Emails".  This briefly explains these technologies and what you need to do. Your IT department should know what to do with this information.

Those 2017 email borne viruses took out government departments, hospitals and big businesses around the globe. To think that it wont happen again is unrealistic. Every time one hits, more and more look at what they can do to protect themselves.  Employing DMARC and DKIM are easy methods to deploy and at least offer some level of security.  Those that don't have it yet, you can be pretty sure soon will have.  Services such as Hotmail, Gmail and Yahoo already do to some level. To ensure you can deliver emails, you must follow suit and make sure that your DNS entries are set correctly.

If you want to chat with about this, please call us on 1300 132 739

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