To obtain certificate from an authorityįirefox and Microsoft Internet Explorer contain cryptotools capable of generating public/private keypairs. ![]() See for a thread explaining why you can't use their SSL/TLS certificates for S/MIME. Let's Encrypt does not currently offer S/MIME certificates. It can also cost money to revoke a free certificate. Everybody else appears to offer a free certificate for personal use for only 30 days, or require you to buy one. Wosign (WoSign certificates have been revoked by Mozilla)Ĭurrently only Actalis seems to offer a free S/MIME certificate for personal use that is good for one year.StartCom (StartCom certificates have been revoked by Mozilla).Secorio (Affiliated Partner of Sectigo (formerly called Comodo) that links to InstantSSL if you want a free certificate).InstantSSL (free certificate is now a 30 day trial).GlobalSign (No longer offer free certificates).Comodo (They've changed their name to Sectigo and no longer offer free S/MIME certificates/). ![]() ![]()
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