The PTR record for 206.18.123.221 resolves to 03030611n4m055.imcu.local. Ask your ISP to change it to mail.imcu.com or whatever is appropriate.
On Fri, Aug 6, 2010 at 9:24 AM, [email protected] <[email protected]> wrote: > 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: <[email protected]> > 250 sender <[email protected]> ok [31 ms] > RCPT TO: <[email protected]> > 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/> ~ > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
