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There is an S/MIME .p7m attachment to my email, what is it?

April 26, 2017email mime

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There is an S/MIME .p7m attachment to my email, what is it?

2 Answers

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S/MIME is the secure email protocol, and .p7 is a digital signature file. If this is received as an attachment, or text block, then you are using a mail client which is not S/MIME compatible, and will not be able to use the attached certificate.

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S/MIME is the secure email protocol, and .p7 is a digital signature file. If this is received as an attachment, or text block, then you are using a mail client which is not S/MIME compatible, and will not be able to use the attached certificate. Back To Top —————– After installing the certificate I get an ‘Expired Certificate’ message. This could happen because your certificate has been issued in our time zone and has not become valid yet. All you need to do then is wait a while or turn your clock forward. Another possible cause is that our CA root in your browser is old and needs to be updated.