S/MIME and Disclaimer for Exchange Server and IIS SMTP Service

Platform: Windows XP or later (32bit/x64)
IIS SMTP Service or Exchange Server 2000/2003/2007/2010/2013/2016/2019 installed

Add html disclaimer or html signature with embedded images and digital signature to outgoing emails or encrypt outgoing email with S/MIME certificate in Exchange Server and IIS SMTP Service. Moreover, email encryption (with using the recipient's digital certificate) and S/MIME (Secure / Multipurpose Internet Mail Extensions) will become fully supported in your Exchange server.

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Why Disclaimer, S/MIME is important?

In recent years, many regulations about email for commercial communication have came into force in varies countries. For example, Germany has laws requiring companies to disclose their company name, registration number, place of registration etc. in e-mail signatures. Ireland's Director of Corporate Enforcement requires all limited companies operating websites to disclose such information in their emails. The UK's ECommerce Regulations require this information in all emails from limited companies as well. While criticized by some as overly bureaucratic, these regulations only extend existing laws for (paper) business correspondence to email. Any infringement to these regulations will result in lawsuits.

Even if your country has no similar regulation, it is still worth to append an email disclaimer in every email as in some situations it may protect you from liability in a court of law.

Implementation of Disclaimer or email digital signature can be done on client side. A simple way is to ask your employee to have disclaimer/digital signature set in their email clients. However, this method is lack of flexibility and there is no way for a company to verify if a disclaimer was added and its content is correct.

With EA Disclaimer, S/MIME tool, instead of end user, server administrator sets disclaimer, digital signature for each user on server side. This greatly adds fexiblitiy and controllability to your company and simplify the task. Moreover, thanks to digital signing capability of the tools, outgoing emails will be avoided to be moved to junk folder of Hotmail, Gmail and Yahoo mail.

S/MIME and Disclaimer for IIS SMTP Service and Exchange Server Features List

HTML Disclaimer/HTML Signature
  • Plain text disclaimer and html disclaimer.
  • Embed image in html disclaimer.
  • Insert multiple disclaimers based on sender and recipient.
  • Personalize disclaimer by utilizing Active Directory user contact variables.
  • Skip lines which contain variables that is not provided.
  • Insert disclaimer to replied email body smartly instead of appending disclaimer at the end of email body.
Digital Signature(S/MIME)
  • Signing Algorithms: rsa-sha1, rsa-sha256, rsa-sha384, rsa-sha512
  • RSA-PSS padding with sha1, sha256, sha384, sha512
RFC 1847
RFC 2311
Email Encryption(S/MIME)
  • Encryption Algorithms: Rc2, TripleDes, Aes-128, Aes-192, Aes-256
  • RSA-OAEP with hash: sha1, sha256, sha384, sha512
RFC 1847
RFC 2311

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