Web file server software for centos 79/19/2023 This guide will discuss how to setup a centralized mail relay server for the sole purpose of sending only outbound email. All the other servers simply send their mail to this central mail relay server to handle sending mail, which alleviates the need for unnecessary outbound access for those other nodes. Having a centralized mail relay server solves for this by serving as a central location for mail logs and only opening the firewall for one server to allow outbound port 25 access. This becomes a headache as you need to open up your firewall to allow all these servers outbound access over port 25 and your mail logs are scattered among all those servers. Lets say you have dozens or hundreds of servers that all need to send mail out directly to the internet.
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