Similarly, when the internal mail server receives a message destined for an external network, it accepts the message...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
from the client and then passes it to a DMZ's SMTP relay. The relay then forwards the message to the destination server. This architecture prevents direct connections from the Internet to the internal mail server, providing a layer of isolation.
As an added bonus, you can use a spam-filtering device as your SMTP relay. Devices like SendMail's Sentrion appliances and the Barracuda spam firewall are popular tools that can reduce the spam-filtering burden on clients.
Dig Deeper on DMZ Setup and Configuration
Related Q&A from Mike Chapple
A proposed cyberattack information database in the U.K. aims to improve cyberinsurance. Expert Mike Chapple explains what collecting data breach ...continue reading
The proposed CFTC regulations on cybersecurity testing are set to finalize in 2016. Expert Mike Chapple discusses the effects these regulations have ...continue reading
Whether Apple is a HIPAA covered entity was called into question when it advertised for a health regulations lawyer. Expert Mike Chapple discusses ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.