Extract text from S/MIME messages (P7M)
To convert P7M messages to another format, you need Microsoft Outlook or other Encoded software.
To convert other file formats to the "S/MIME Encrypted Message" file type, you need software like Microsoft Outlook or a similar tool.
The .p7m file extension is a Cryptographic Message Syntax (CMS) container, most frequently encountered as an smime.p7m email attachment. It is utilized by the S/MIME (Secure/Multipurpose Internet Mail Extensions) protocol to digitally sign and encrypt email communications, ensuring message integrity and sender authenticity. These files are typically managed by enterprise-grade email software like Microsoft Outlook or Mozilla Thunderbird.
The primary disadvantage of the .p7m format is its rigid opacity. When a user receives an S/MIME encrypted message in a standard webmail interface (like basic Gmail or Yahoo) or a mobile device lacking the proper certificate configuration, the email body is completely hidden. Instead, the user is left with a useless smime.p7m attachment that cannot be read natively by text editors or web browsers. Without the exact private key or a dedicated cryptographic tool, the data is entirely inaccessible, causing immense frustration for standard users.
To bypass these limitations, you must extract the payload from the container. If the message is only digitally signed (and not encrypted), you can convert the .p7m file to EML to read it in any standard mail client, or extract the raw text to a TXT file. For archiving purposes, converting the extracted contents to PDF is the best solution. Just drag and drop your file here to analyze and convert it - free, online, and without installing heavy cryptographic software.
Convert.Guru analyzes your P7M file, detects the exact format, and lets you read the text inside.
Users also converted P7S, MIME, PDF, P7, REL, ZIP, XML, JPG, XBRL, CXF, P7B, ADF and P7C files.
If you want to convert P7M file to PDF, PEM, P7S, XML, TMP, TEMP, CACHE, LOG, BAK, OLD, NEW or PART, you can use Microsoft Outlook or similar software from the "Cryptographic Email Container" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to P7M, try Microsoft Outlook or another comparable tool in the "Cryptographic Email Container" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our P7M converter.