POP3 retrieved mail is ignored by the antispam
The Bitdefender for MS Exchange antispam analyzes only SMTP retrieved messages. POP3 mail retrieval is available in Small Business Server 4.5 or later and as an 3rd party connector for Microsoft Exchange Server. The antivirus module scans the messages regardless of the transfer protocol.
We recommend filtering the spam on the desktop using Bitdefender Professional Plus when using a POP3 mail retrieval solution on the server.