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Hello everyone,
I have had the opportunity to implement Sophos Central Email Security in Mailflow and Gateway mode, always using only 1 mail server in office365 and exchange. However, I wonder how the implementation would be if I had a client who uses zimbra and also exchange or office365?
Thanks
It really isn't that complicated. Mail servers deliver messages via Host Records and MX records, so essentially in gateway mode you configure in your DNS record
mail.example.com
MX 10 zimbra.example.com
MX 10 exchange.example.com
Now with this you won't know which server will get the incoming email. You could optionally change the weight for one server to say 100 and that would mean messages would go to the server with the setting of 10 unless it wasn't available. In the mail host below set mail.example.com and DNS will sort out the rest. In the below example I'm delivering everything to domain-mail.protection.outlook.com
cemapm.com mail is handled by 10 mx-01-us-west-2.prod.hydra.sophos.com.
cemapm.com mail is handled by 10 mx-02-us-west-2.prod.hydra.sophos.com.
cemapm.com mail is handled by 100 cemapm-com.mail.protection.outlook.com.
If I were going to deliver in a Hybrid fashion I would recommend deliver to the cloud and then have the cloud deliver to the on-premise mailboxes.
Hope this helps.
