Exchange Sending Emails From Wrong Account

Hi Experts,

We are running Exchange 2003; we have our staff setup with 2 email addresses: one internal (user@domain.org) & external (user@fullcompanyname.com). The internal account uses our Exchange server to send mail around the office. Our external account is managed by our ISP. If a user sends external mail using their internal account the recipient receives the mail but cannot reply since the reply to address is private/internal to our network. We use Outlook as our mail client & the default account to send mail is set to External. Occasionally, Outlook (or Exchange; not sure where the switch is happening) will send mail via their internal accounts & clients complain because they get a mail admin error when replying: "user@domain.org cannot be found".

Where could the problem be lying that would switch the default account from External to Internal? Outlook or Exchange?

Thanks for your time,

Matt
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brodaseatingAsked:
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brodaseatingConnect With a Mentor Author Commented:
It appears to be an issue with Outlook XP (2002); installed 2007 & seems OK. Will keep testing for a few days.

Thanks,

Matt
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D_HartupCommented:
One big initial question is, why have two mailboxes??

But avoiding that - to clarify, is this two actual mailboxes/active directory accounts per user, or is it two email addresses on the user's Active Directory email list?

if it's the latter, and this occasionally switches everyone back to the wrong one, then I'd guess that the tickbox at the bottom of the emails tab is ticked, which will copy the settings from the DEfault Receipient Policy once every so often. You can either untick the tick box for each user, or change the Default Recepient Policy to set the global default domain to be used.
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brodaseatingAuthor Commented:
@D_Hartup,

Each user only has one email account in Exchange (Internal); we've kept their External email address (separate from Exchange) & just use a pop account in Outlook. This is the account that should be defaulted to but occasionally external emails get sent out on the internal Exchange address.

Thanks,

Matt
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D_HartupCommented:
Ah right - thanks for clarification, but I've never seen that behaviour with the default email not working in Outlook. I'd make sure all updates and service packs are applied... sounds like something that would be a known, fixed fault...
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brodaseatingAuthor Commented:
Agreed, we really should have a single email address for internal/external emails. I will look into this when I get some more time.

Thanks,

Matt
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D_HartupCommented:
Nice - things like that that seem crazy behaviour generally are bugs or known issues - it's fairly un-microsoft to have things change beneath your feet without rhyme or reason (there are of course a few key exceptions to this!)
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