Do Alentus Exchange servers use the same Barracuda firewalls as are used for POP accounts?

No.
Our Exchange mail services operate separately from the Barracuda Spam firewalls that sit in front of our regular POP3 email servers. Spam filtering for Exchange mail uses its own spam filtering that allows customers to see and manage the blocked list, handle quarantined emails, whitelists, and blacklists.

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