Mail is one of the hardest services to manage. Actually, mail is pretty simple in and of itself: there’s protocols people use to access their mail (such as IMAP and POP), protocols used to communicate between mail servers and send mail (SMTP, SMTPS) and then there’s a database of mail and user information. In macOS Server 5.4 for High Sierra, all of these are represented by a single ON button, so it really couldn’t be easier, once you can just enter email addresses into the Users section. But then there’s the ecoysystem and the evil spammers. They’re totally the worst. Like ever. As the former systems administrator of a large number…
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Use SSH, ARD, SNMP, And The Server App Remotely on OS X Server 5
SSH allows administrators to connect to another computer using a secure shell, or command line environment. ARD (Apple Remote Desktop) allows screen sharing, remote scripts and other administrative goodness. You can also connect to a server using the Server app running on a client computer. To enable any or all of these, open the Server app (Server 5 for El Capitan and Yosemite), click on the name of the server, click the Settings tab and then click on the checkbox for what you’d like to enter. All of these can be enabled and managed from the command line as well. The traditional way to enable Apple Remote Desktop is using…
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Resolve 530 5.7.1 Client was not authenticated Error In Exchange 2010-2012
When working on mail flow issues, one of the first troubleshooting steps with any mail server is to try and telnet into port 25 of the server. Exchange has an error, 530, that says that the smtp connection wasn’t authenticated. If you’re trying to relay through an Exchange server, that’s a good thing, as you wouldn’t want an open relay. However, if you’re trying to relay to an Exchange server, that’s not such a good thing. So let’s look at what this symptom looks like. First we try and telnet into port 25 of the server: telnet exchange.krypted.com 25 Which shows the following: 220 exchange.krypted.com Then we say hi: Helo…