Re: Problems with BCC in SBS-Exchange 2003
- From: Michael Tovey <michael.spamtovey@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 8 Sep 2006 05:41:02 -0700
Many Thanks,
Looks like a weekend at work switching our Pop to SMTP
:P
Many Thanks for your help!
Michael
--
SBS 2003 - Admin
SVR 2003 - Admin
SQL 2005 - Admin
"Joe" wrote:
Michael Tovey wrote:.
Hello All,
This one is starting to bug me, I have about 20-40 Emails a day that Fail to
be delivered to their recipient.
I have setup Routing Via the POP3 account and have a Global Mail box with a
Catch all setup to.
I have mailed into this Forum before and each time get further in my quest,
but still no final answer!
I have the weekend at work and All i can think of is removing the pop and
starting again! not realy looking forword to that!
Any Idea's..
The final answer is that when the POP3 protocol is used for multiple
recipients, BCC and mailing list messages do not work.
The reason is that the recipient is named in the SMTP envelope to the
POP3 server, and not in any of the standard email headers. In a POP3
mailbox belonging to a single user, there is no doubt as to whose
mail it is. In multidrop POP3, the message on the POP3 server now has
no identifying information in its standard headers, and the client
cannot deliver it.
Many POP3 servers add a custom header, such as X-Envelope-To: which
does carry the recipient's name, but not all POP3 clients look for
this type of header. I gave up on the Exchange POP3 connector within
two weeks, for other reasons, so I don't know whether it can be
configured to use a custom header in this way. I've never seen anyone
else suggest that it can.
If there is a unique identification in the To: or CC: header, then
the connector can deliver to a specified mailbox. If only one of your
users subscribes to a particular mailing list, for example, the To:
header will usually contain the list address itself, and Exchange can
take this as an instruction to route to that user. If more than one
user receives mail from the same list, then a distribution group
mailbox can be set up to accept this mail and forward to all the
users, though they will each get multiple copies. See the Routing tab
on the POP3 connector manager.
BCC mail is more of a problem, as it can come from anyone. The only
workaround is to contact the regular senders of BCC, tell them you
can't accept it, and ask for a separate copy of the mail to be sent
to your users.
You might try asking your ISP if they have any recommendations about
Exchange, but few customer-facing ISP help people have ever heard of
Exchange, even if their company uses it.
Alternatively, you can switch to SMTP for receiving mail. Exchange
will then receive the SMTP envelope for BCC and mailing list mail
and will route it correctly.
Or you can use a third-party POP3 downloader which recognises custom
headers, assuming your ISP is adding one, and will forward to an SMTP
server. Exchange would then accept mail by SMTP from it.
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