Which mail systems / clients support S/MIME Certificates?

S/MIME Certificates are natively compatible with all major email clients, internet browsers and mobile devices.

Email clients:

Microsoft Outlook
Apple Mail and MailMate
Samsung Mail
CipherMail para Android
eM Client
Mozilla Thunderbird
Gnome Evolution
SeaMonkey


Web clients:

Outlook Web App (Exchange Server 2013 or 2010)
Outlook on the Web or Exchange Online (Microsoft 365 or Exchange Server 2016)
Gmail (G Suite Enterprise or Education)
Zimbra Web Client
Zoho Mail (Mail Premium or Workplace Professional)


Operating system (OS):

Windows
Linux
MacOS
iOS
Android


And any other email client or system that supports S/MIME certificates.


If you don't have an S/MIME Certificate or need to renew your existing one, check out our offerings: https://flexbox.cloud/en/secure-email-smime-certificate/

Updated on: 30/10/2023