Questions regarding features in Zimbra free and NE

[eaperezh]

Hi guys,
Can I do these things with the latest free version of Zimbra?
1- S/MIME
2- Two-factor authentication
3- Active Directory auth
4- or LDAP or FreeIPA auth

thanks for your help.

[zimico]

Dear,
According to https://www.zimbra.com/email-server-sof ... omparison/ , you must use NE for those features.
In case of using OSE, there are some alternatives such as OPENPGP Zimlet, 2fa ZIMLET for OSE.
Best regards,
Minh.