Sophos

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We are implementing Zimbra which will server about 200-300 users.

We are currently using Sophos with our current outdated Exchange server (can't wait to get rid of it), which is an appliance that filters spam and catches some virus's.

Anyhow, our MX record points to the Sophos box which then forwards the filtered mail to the Exchange box.

When installing Zimbra, the install will bark that the mx record is not set up correctly.

Could anyone give some suggestions about the best way to tackle this situation?

I can go ahead and disable the dns lookup and create a relay, but wanted some input about the best way to proceed.

Thanks in advance,