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Troubleshooting DNS with NSLookup and dig

To be proficient at troubleshooting name server problems, you'll need a special tool to make DNS queries, one that gives you complete control. We'll cover nslookup in this tutorial because it's distributed with Windows Server 2003 and with many other operating systems. We'll also cover another query tool, dig, that isn't part of Windows. It provides similar functionality and doesn't suffer from nslookup's deficiencies.

Telnet to Port 25 to Test SMTP Communication

Summary

MMS 2011: Day five wrap up

Last day in Las Vegas! The party last night was not too shabby, even being thrown and attended by some hardcore geeks. The party had a western theme, some good food (ribs, corn on the cob, and the usual western fair), pretty square dancers, and even a decent band (The Scotty Stamp Band). One of the singers did a great Johnny Cash.

NSLOOKUP (TCP/IP)

NSLOOKUP (TCP/IP)

How to troubleshoot Basic SMTP Delivery Problems

The following are basic steps that a mail admin can take to determine the cause of an SMTP mail delivery problem. This procedure assumes that an Exchange IMS is deployed using DNS lookups, rather than forwarding SMTP to an a third part gateway or relay host. Basic things to check <p...

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Five Latest Forum Posts

NSLookup back online

I have fixed the bug in the NSLookup tool, and it is available for all users.

Security Measures

I've had to add a Captcha field to the NSLookup. Sorry about that

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