tag:blogger.com,1999:blog-425966386352251311.post3758866166057404693..comments2023-10-26T05:26:47.606-07:00Comments on Life as an Exchange-guy: Using NSLookup to determine an SMTP receiving systemDean T. Uemurahttp://www.blogger.com/profile/12545002231016283133noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-425966386352251311.post-27246132002559917092016-01-30T00:41:40.070-08:002016-01-30T00:41:40.070-08:00Nslookup can also be used to check up on your OWN ...Nslookup can also be used to check up on your OWN network from a security perspective.<br /><a href="https://dnslookup.org" rel="nofollow"><b>Nslookup</b></a>Anonymoushttps://www.blogger.com/profile/04556714026619373851noreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-54299895630602363022011-03-20T23:50:32.254-07:002011-03-20T23:50:32.254-07:00Hi nice article, im new here being an exchange guy...Hi nice article, im new here being an exchange guy can you help with this.. SCENARIO: In our mail server outgoing messaging always fail but the incoming mail works fine.Pap0tZhttps://www.blogger.com/profile/05795204351339779535noreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-74785210834043823252010-01-18T22:22:43.029-08:002010-01-18T22:22:43.029-08:00Did you mean the NSLookup doesn't respond or t...Did you mean the NSLookup doesn't respond or the Telnet session doesn't respond?Dean T. Uemurahttps://www.blogger.com/profile/12545002231016283133noreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-78450304609833312882010-01-18T22:21:13.786-08:002010-01-18T22:21:13.786-08:00If the Telnet session doesn't get a response, ...If the Telnet session doesn't get a response, it means either that TCP 25 isn't open between the two computers. That could mean that a router or firewall between is not allowing port 25, or the recipient system isn't listening for port 25.Dean T. Uemurahttps://www.blogger.com/profile/12545002231016283133noreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-31661205232814190392010-01-16T04:17:39.374-08:002010-01-16T04:17:39.374-08:00What can be the problem if it doesn't connect?...What can be the problem if it doesn't connect?Chitinutanoreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-26512281963412241862009-12-05T13:33:16.974-08:002009-12-05T13:33:16.974-08:00You are absolutely correct - thanks for pointing t...You are absolutely correct - thanks for pointing that out.Dean T. Uemurahttps://www.blogger.com/profile/12545002231016283133noreply@blogger.comtag:blogger.com,1999:blog-425966386352251311.post-35776347814799249822009-01-29T09:03:00.000-08:002009-01-29T09:03:00.000-08:00Thanks for a great article. Minor point, when I us...Thanks for a great article. Minor point, when I use nslookup to look for type, the syntax is 'set type=mx'. You can't have spaces around the equal sign.Anonymousnoreply@blogger.com