Zitat von David Touzeau <da...@touzeau.eu>:
Yes i heard about VPN but in some cases in a big environnement you cannot play with networks and firewalls as you like. And there is a lot of remote sites to discuss, create VPN trought all theses remote sites is to complicated to maintain.yes i need to find a plugin like djigzo but djigzo is too heavy product (postgrey, web server... ) that requires too much components to implement
As said it depends:- If you simply want to encrypt between a small number of sites use enforced TLS with cert checking - If you need encrypt mail traffic and others between a small number of sites with trust relationship use some form of VPN - If you need ad-hoc encryption of e-mail with a number of mail recipients implement some form of PGP or S/MIME gateway
I can say it is not that hard to setup Djigzo and it provide a poliy drive way to handle encryption and signing for e-mail.
Regards Andreas
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