Tag: Mail Server

Have You Checked Your Email Server’s Reputation?

Most ISPs (big or small) are not aware of their company’s status on the Internet; let alone what it is and how to check it. In fact, it is called a reputation, and this is the grade that is given to either your domain name (or the domains hosted on your system) and/or the IP addresses that you use to send mail out. (Feb 17, 2011)

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How to Troubleshoot 501 5.7.1 Errors with Exchange

If you’ve ever had “501 5.7.1 This system is not configured to relay mail from…” errors when relaying email through Exchange, it means that your email client did not properly log on to the mail server because it failed the SMTP authentication check. (Jan 31, 2011)

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Troubleshooting your mail server part 2

In Part 1 of Troubleshooting your email server, I showed you how to use telnet to determine whether or not your mail server is having communication problems on port 25. In this part, we’ll see how to test address resolution to check for DNS Server problems (Jan 27, 2011)

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Troubleshooting your mail server part 1

It’s not unusual to get an end-user complaint about problems sending email or login attempts timing out. These issues often point to a specific client configuration or browser setting. But what if the situation involves more than a simple client feature, and has been reported by many end users? The first step is to determine if there is indeed a server communication problem. (Jan 17, 2011)

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Test your mail server security infrastructure with Email Security Grader

Email Security Grader is a free online tool which helps IT and mail administrators evaluate the security of their mail infrastructure. The web site regroups several important tests (spam blacklist, open relay, mx records, smtp/pop3/imap authentication), educates users and makes recommendations for each aspect of email security. (Nov 01, 2010)

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Email Security Gateway Deployment: Avoid These Common Mistakes

Don't declare your primary mail server (MTA) as a secondary MX. (Oct 02, 2009)

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