Removing the Accepted domain in Exchange Server 2007

Hi All,

What could be the impact when I remove the accepted domain in Exchange Server 2007 ?

for example:
Domain1.com
Domain2.com
Domain3.com

assuming the whole companywide can no longer accept the email when I remove Domain2.com, I wonder what will happens to the emails send to user1@domain2.com ?

how long will it takes before the email is rejected ?
LVL 8
Senior IT System EngineerIT ProfessionalAsked:
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imkotteesConnect With a Mentor Senior Messaging EngineerCommented:
yes thats correct.. immediately it will reject..
http://technet.microsoft.com/en-us/library/bb124423(v=exchg.80).aspx
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Senior IT System EngineerIT ProfessionalAuthor Commented:
and it should be applied immediately right ?
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mmichaConnect With a Mentor Commented:
imkottees is correct.

The minute you remove the domain it will begin rejecting email.  However, if/when you remove the domain you may have to remove it prior from accounts that have it as an alias email-address.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
ok, so what about the secondary email address that is applied to all of the mailboxes as the secondary SMTP address ?
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imkotteesConnect With a Mentor Senior Messaging EngineerCommented:
they would not remove from the mailbox properties by itself.. you should remove them manually..
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Manpreet SIngh KhatraConnect With a Mentor Solutions Architect, Project LeadCommented:
If you dont want DOmain2.com to receive emails you can also have that done using Transport rule or even redirect or NDR so depends how you want to proceed

- Rancy
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Senior IT System EngineerIT ProfessionalAuthor Commented:
thanks !
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Hi,
I got this reply when I do the testing to the migrated mailbox

#< #5.4.6 SMTP; 554 5.4.6 Too many hops> #SMTP#

is that expected ?
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