RE: Unable to send SMTP mail with alternate FROM address

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Thank you for answering but it doesn't really help resolve the problem. I'll
try to make this clear:

1. I have a computer system with Thunderbird on it.

2. With my user ID, I can login and configure Thunderbird as an IMAP client
to my Exchange 2003 SP2 system. The outgoing SMTP server is the secure SMTP
virtual server described in the original posting. Everything works OK.

3. I configure a second account in Thunderbird for my gmail account. I
intentionally configure it incorrectly so that it will not connect to gmail
and I never try to access gmail. I just want to use the "From" address. After
configuring the second account, I am still able to send mail to my corporate
Exchange server with an alternate FROM address (my gmail address). This works
fine and I'll demonstrate this by sending you an email if you'd like.

4. I log off of my Linux system and log in as a test user that I have named
cmonster. This is a totally unprivileged user and only belongs to the Domain
Users group. I configure Thunderbird as an IMAP client to access email and
everything works OK. The SMTP server is the secure virtual server that I used.

5. I configure a second account in Thunderbird for my gmail account. Like
before, I intentionally configure it wrong so that it won't connect. I try to
send another email to the Exchange server with a different FROM address as
cmonster and I get an error message back from the Exchange server: An error
occurred while sending mail. The mail server responded: 5.7.3 Client does not
have permission to Send As this sender.. Please verify that your email
address is correct in your Mail preferences and try again."

6. If I change the properties on the SMTP server so that I authenticate on
the Exchange SMTP virtual server with my account rather than cmonster, then
it works OK and I can successfully send with an alternative FROM address. But
a typical user who just belongs to Domain Users can't.

So the exact same thing fails for the cmonster account that works for my
account. There is something different somewhere and I need to figure out what
it is. This has to do with permissions somewhere but I am not sure where.

Thanks for your help!
Pat

--
Pat Allen
Monterey Bay Aquarium Research Institute (MBARI)


"chace zhang" wrote:

Hi,

Thank you for posting back.

Based on my knowledge, a mailbox uses its primary SMTP address for outgoing
message by default in Exchange box. Thus, you cannot specify the email
address for the outgoing message even you have add additional SMTP
addresses for the mailbox.
Except you add additional mailbox as you have mentioned or you configure
another POP3 https email account in outlook profile for example:
@google.com @hotmail.com

In these scenarios, you are able to switch the email addresses in your
current Outlook profile.

Hope this helps, if you have any other concerns, please feel free to let me
know.

Have a nice day!


Best Regards,

Chace Zhang (MSFT)

Microsoft CSS Online Newsgroup Support

.

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