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SMTP multiple domain names

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SMTP multiple domain names - 9.Jun.2003 11:31:00 AM   


Posts: 8
Joined: 11.Feb.2003
From: HK
Status: offline
Dear professionals,

I have some problem sending emails with Multiple Domain names.

Currently, my computer is hosting an Exchange server with a domain name
"company.com", and all the users have email addresses named with pattern
Now our company wants to use the Exchange for internal only with all users
email address to userX@office.com (office.com never exist)
For each user, I've add a new default reply address in each user profile and set it as

For SMTP, I've enabled everything from Authentication with anonymous. We
can send and receive office.com emails among staffs with no problem.

However, that's too dangerous, anyone can use our SMTP service(if they found it exist, and people did...) and send junk emails generating
heavy trash. But when I uncheck anonymous (check Basic and
Integrated WA), I received this message when trying to use the SMTP for sending:

The message could not be sent because the server rejected the sender's
e-mail address. The sender's e-mail address was 'user1@office.com'. Subject
'testin', Account: 'Office Profile', Server: 'company.com', Protocol: SMTP,
Server Response: '454 5.7.3 Client does not have permission to Send As this
sender.', Port: 23, Secure(SSL): No, Server Error: 454, Error Number:

I cant send to any office.com emails if my sender address is office.com and
not company.com. How can I tell exchange that user1@office.com is valid for
sending and receiving emails.

Pls advise. Your help could someone's life, and job. Thx.

Post #: 1

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