DKIM for Exchange Server and IIS SMTP Service

Platform: Windows 2000 or later (32bit/x64)
IIS SMTP Service or Exchange Server 2000/2003/2007/2010/2013/2016 installed

Add DomainKeys/DKIM signature to outgoing emails in Exchange Server or IIS SMTP service. Prevent the emails from your domain from being flagged as spam or junk mail by email servers which have Domainkeys/DKIM implemented (such as Hotmail, Yahoo mail and Gmail). SSL, TLS, S/MIME, Gmail OAUTH, Live OAUTH, HTML and Embedded Images are supported.

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Why DomainKeys/DKIM is important to your Exchange Server?

Email fraud is one of the biggest threat in the Internet world. To combat this, email authentication standards known as Domainkeys/DKIM were developed. DKIM allows an organization to generate cryptographic signatures on outgoing email to certify the origin of a message as coming from an authorized server for that domain and the integrity of email contents, which consequently is very useful for anti-phishing.

As Domainkeys/DKIM becomes more widely deployed, particularly in webmail services, financial sectors and e-commerce firms, if your domain has no DKIM implemented, outbounce emails from your domain are likely be flagged as spam or junk mail by the email servers which have Domainkeys/DKIM enabled (such as Hotmail, Yahoo mail and Gmail).

DomainKeys/DKIM for Exchange Server and IIS SMTP Service Features List

DomainKeys
  • Signing Algorithms: rsa-sha1
  • Canonicalization Algorithm: simple/nofws
  • Disable option for specified recipients
  • Deployment Tool for Windows DNS Server
RFC 4870
DKIM
  • Signing Algorithms: rsa-sha1, rsa-sha256
  • Canonicalization Algorithm: simple/relaxed
  • Sign a part of message
  • Disable option for specified recipients
  • Deployment Tool for Windows DNS Server
RFC 4871
Sender Rule
  • Send email on behalf on customer email address
  • Sign DKIM/DomainKeys based on customized sender email address
 
SPF/DMARC Tool
  • Generate SPF/DMARC record
  • Deployment Tool for Windows DNS Server
 

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