Re: exchange2003 problem!
- From: Joe <joe@xxxxxxxxxxxxxx>
- Date: Wed, 15 Jul 2009 16:56:16 +0100
Blair Lock wrote:
Hi Guys,
im a technician in s.a. and have run into this problem a few times now
and am not getting any help from Microsoft.
when external users send an email via a distribution list eg:(price
list to their customers) Exchange is unable to route the mail to the
correct user within the organization. the mail is being delivered to the
administrators mailbox.
That's because you're using POP3 mail collection from a domain-wide mailbox. BCC mail won't work either.
Switch to receiving mail by SMTP.
i see that more and more companies are sending mail in this fashion and
is becoming a huge problem from me!
mail flow on the server is working just fine however its only when an
external user sends a mail by use of a distribution list does my server
send the mail straight to the admins mailbox and not the director of the
company(whom the mail is intended for)
thanking you in advance for any help provided.
Also see: OK, Google doesn't seem to be finding this, here's a direct quote:
"Email routing by SMTP does not depend on headers, but on the recipient name used in the SMTP transaction. This is not part of the headers, and may not survive being placed in a POP3 mailbox. It can only survive if one of the SMTP servers which handles the email explicitly adds a header called 'Envelope-To:' or something similar. Many POP3 downloaders can make use of this kind of header, the SBS2003 one cannot.
If for some reason there is no To: or CC: header, such as with BCC or a mailing list (which is just a big BCC mailing), the SBS2003 POP3 downloader does not know where to deliver the mail. Almost certainly, this is the problem. The correct answer is to use SMTP for mail collection. If there is some seriously immovable objection to doing this, and there are few valid ones, there are broadly two options:
1. Use a third-party POP3 downloader, after checking that a) your ISP is adding or checking for an Envelope-To: or similar header, and b) that the downloader can make use of it for routing.
2. If the ISP allows it, do not use a domain-wide POP3 mailbox, switch to individual mailboxes for each user with a few for 'sales' and so on. The SMTP envelope information will be used at the POP3 server to drop the mail into the right mailbox, with a domain-wide mailbox it all gets thrown in together. When the boss tells you that he must have a catch-all mailbox to avoid losing sales due to typos, tell him that the SMTP system very quickly tells a sender when the recipient is non-existent, and it is better to do this than to allow the sender to continue to use an incorrect email address and maybe pass it on to others as well.
But SMTP all the way to Exchange is better. "
--
Joe
.
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