On Fri, Jun 20, 2014 at 09:31:44AM +0200, Greg wrote: > I'm trying out COMODO's free S/MIME cert. On recipient machines, however, a > warning is shown that the certificate was signed by an unknown authority, > "COMODO Client Authentication and Secure Email CA." > > Indeed, Thunderbird appears to hold no such authority certificate. According > to Comodo, it should be as follows. > > 1) AddTrustExternalCARoot.crt - Root > 2) COMODOClientAuthenticationandSecureEmailCA.crt - Intermediate > 3) UTNAddTrustClient_CA.crt - Intermediate > > The first one appears to be included in Thunderbird, but the other two > aren't. I find it hard to believe Comodo would expect recipients of signed > messages to install these, but Comodo's support is saying this is so.
Are you actually sending all those certificates together with message? Kurt _______________________________________________ dev-security-policy mailing list dev-security-policy@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-security-policy
