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At our company we use Ironport at the ISP side and use Brightmail [Symantec] internally.<br />
So far we have never had issues.
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At our company we use Ironport at the ISP side and use Brightmail [Symantec] internally.
So far we have never had issues.

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my company they looking for antispam gateway so can you help to choice from iron mail or iron ports
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my company they looking for antispam gateway so can you help to choice from iron mail or iron ports

best antispam gateway appliance  iron mail vs iron port

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.