I am really confused. I am using MXToolBox and the SMTP tool. I get the below results:
220-nachodevice.imcu.local ESMTPIronport Success Not an open relay. 0 seconds - Good on Connection time 0.546 seconds - Good on Transaction time OK - 206.18.123.221 resolves to 03030611n4m055.imcu.local OK - Reverse DNS matches SMTP Banner Session Transcript: HELO please-read-policy.mxtoolbox.com 250 nachodevice.imcu.local [16 ms] MAIL FROM: <supert...@mxtoolbox.com> 250 sender <supert...@mxtoolbox.com> ok [31 ms] RCPT TO: <t...@example.com> 550 #5.1.0 Address rejected. [31 ms] QUIT 221 nachodevice.imcu.local [47 ms] The nachdevice.imcu.local is my ironport, I get that The 03030611n4m055.imcu.local is my Exchange server, on the internal side of the firewall. I have an mx record for the ironport's external port. I do not know why the 0303... name is being published to the world?? Any ideas?? ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
