i have 2 prodution domains: domain a domain b Domain a has exchange server 2007 witch contains 1 ldap server and 1 mailbox server Domain b has exchanger server 2010 witch contains 1 ldap server and 1 mailbox server i am having the issue of being able to send and receive email to the 2 domains. -when a user on domain a sends a email to a user on domain b the user on domain b never ets the email, and the same is for a user on domain b trying to send a email to a user on domain a. the user on domain a never gets the email. anyone have any ideas?Danny G Guillory Jr.

Hi, Could you post an error message? Are the two domains in the same forest? /MartinExchange is a passion not just a collaboration software.

nope there in different forest and neither user ever gets a error message ideas?Danny G Guillory Jr.

Hi Have you tried doing a message tracking on the mails? If they are on the same network you could add a send connector with a smart host so that the mails are sent directly between the servers instead of going though the internet. /MartinExchange is a passion not just a collaboration software.

Do message tracking as mracket suggested. Also see if you can connect and send email via telnet on port 25. 1. Open command prompt on Exchange server A 2. telnet exchangeServerB 25 Helo mail from: user@domainA.com rcpt to:user@domainB.com data subject:test . . James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hi, Any update on your issue? Have you tried to do message tracking on your Exchange server? Have you followed the suggestion by James? Here is an article about how to use telnet to test SMTP communication. http://technet.microsoft.com/en-us/library/bb123686(EXCHG.80).aspx Best regards, SerenaPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

i have tried message tracking. if i send to my smarthost the mail leaves exchange server a and goes to the smarthost then the smarthost is responsiable for sending the mail to the exhange server b. if i take out the smarthost mail never reaches the exchsnge server b. the message que on exchange server a just says some dns error any ideas?Danny G Guillory Jr.

Hi, Sounds like your DNS server aren't able to lookup the MX records for the other domain. Try and use NSLOOKUP to to verify that you can see the server that you need to deliver the mails to. Run this from the hub transport server from each company. Here is an technet article about how to use the nslookup utility: http://technet.microsoft.com/en-us/library/aa998082(EXCHG.65).aspx /MartinExchange is a passion not just a collaboration software.

Hi Danny Any updates to this question? /MartinExchange is a passion not just a collaboration software.

to fix this particular issue i used the triubleshoot tools in exchnage to see 1 that the mail was coming in and going out of the servers. Then what hapen to be the issue was the incomming and outgoing connectors. once i used the troublshooting tools i was able to follow the mail and where it was failing at.Danny G Guillory Jr.