Sep 30, 2011 Hi Dmitry, I am using Redemption to access the outlook to read mails and save if there are any xml attachments. All works fine but if the mail is digitally signed then all I am able to save is a file called 'smime.p7m'. Apps for E-mail Utilities. Further enhance you pre-existing email software using these tools. Receive alerts for incoming mail, extract contact addresses from files, have your emails read to you. Jan 09, 2008 I have a friend who sends me emails to my gmail account that have attachments.p7m and when I click on the attachment it asks me what program I want to use to open the attachment. If I forward these emails to my work email which is outlook I can click on the attachments and they open fine.

File TypeDigitally Encrypted Message

What is a P7M file?

A P7M file is an encrypted email message that contains the contents and attachments of a sensitive email. It is used to prevent unauthorized users from accessing information in an email and may require a private key that matches the message's public key in order to open the document. P7M files are typically used for protecting confidential medical, financial, and business information.

P7M files are typically seen as smime.p7m files. These files include the contents and attachments of an email and have been secured with Secure/Multipurpose Internet Mail Extensions (S/MIME), which is a public key encryption standard of MIME data.

Most P7M files, including smime.p7m files, can be opened using Cryptigo p7mViewer.

Programs that open P7M files

Outlook For Mac 2011 How To Read A P7m Attachment File