Hi all We have a strange issue whereby in some instances exchange doesnt seem to be resolving an email address to the user account, for example we have a helpdesk system which sends email from it.servicedesk@mydomainname where my domain name is my real one, this email address has been added as an address for a valid AD account, but when it comes into our Outlook it doesnt resolve the address to the user name and show that, it just shows it as from it.servicedesk@mydomainname why would this be? Cheers Stewart

On Thu, 29 Jul 2010 05:04:29 +0000, ssssstew wrote: >We have a strange issue whereby in some instances exchange doesnt seem to be resolving an email address to the user account, for example we have a helpdesk system which sends email from it.servicedesk@mydomainname where my domain name is my real one, this email address has been added as an address for a valid AD account, but when it comes into our Outlook it doesnt resolve the address to the user name and show that, it just shows it as from it.servicedesk@mydomainname why would this be? Because the helpdesk system is using an anonymous SMTP connection to send the e-mail. Resolving sender's names from anonymous connections isn't really a good thing to do. If you must do it you should understand that e-mail claiming to be from mailboxes in your Exchange organziation will appear as if they came from that person and not from a SMTP address. I'd set up a Receive Connector for just that application (and maybe any others that need the same handling) and set the authentication to "ExternalAuthoritative" (or check the box "Externally secured . . ." on the property page of the connector). Do NOT do this on any "general purpose" receive connector. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

ahh perfect, youve pointed me in the right direction, i found the Resolve Anonymous Email setting against the SMTP Virtual Server in Exchage System Manager, and also searched and found this KB :- http://support.microsoft.com/kb/828770 Which explains it some more too. Im thinking that it should be ok to turn on for us, as we have our Ironport devices which are the outside email filter so protect our exchange... what do you think?

On Fri, 30 Jul 2010 01:37:42 +0000, ssssstew wrote: > > >ahh perfect, youve pointed me in the right direction, i found the Resolve Anonymous Email setting against the SMTP Virtual Server in Exchage System Manager, and also searched and found this KB :- > >http://support.microsoft.com/kb/828770 > >Which explains it some more too. > >Im thinking that it should be ok to turn on for us, as we have our Ironport devices which are the outside email filter so protect our exchange... what do you think? What I think doesn't really matter since it's your e-mail system. :-) But I do believe that differentiating between anonymous and authenticated message sources is a good idea. --- Rich Matheisen MCSE+I, Exchange MVP --- Rich Matheisen MCSE+I, Exchange MVP

Hi, You can create additional IP address and new SMTP VS, then bind it. And enable Resolve Anonymous user option, then let it only serve for the helpdesk system. To do this can find the balance. Thanks Allen

Sure, thanks all :)