Support for S/MIME-Signed Emails
Many organizations rely on S/MIME (Secure/Multipurpose Internet Mail Extensions) to digitally sign and encrypt emails. S/MIME uses digital certificates to:
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Verify the sender’s identity
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Ensure the message content remains unchanged during transit
Digitally signed emails provide recipients with assurance of the message’s authenticity and integrity.
However, standard email security actions - such as adding banners, rewriting URLs, or removing potentially risky attachments - can unintentionally alter these messages. Such modifications may invalidate the digital signature and trigger warnings for recipients.
Preserving Signature Integrity in S/MIME-Signed Emails
To help maintain the integrity of digitally signed messages, Avanan offers the ability to avoid security modifications for S/MIME-signed emails. When enabled, this feature allows these messages to be delivered without alterations, preserving both the digital signature and the original message structure.
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