Every time I try to send a message with a BCC through Microsoft Outlook, the
e-mail goes into the sent folder but I immedately get a respsonse e-mail
saying that the was undliverable to the people in BCC (those entered into the
To and CC boxes get the e-mail fine).
I check with our domain host and ISP and neither have a small limit on how
many e-mails we can send at a time (The domain host allows 250 and the ISP
allows 200, I'm only trying to send 138). This seems to only be a problem
through Outlook.

Is there any advice someone can give to help me with this?

What does the undeliverable message say, exactly? The error is the key to
the problem, especially if it contains an error message and/or error
numbers.

"BW" <(E-Mail Removed)> wrote in message
news:16BFD99D-A770-4239-B2AD-(E-Mail Removed)...
> Every time I try to send a message with a BCC through Microsoft Outlook,
the
> e-mail goes into the sent folder but I immedately get a respsonse e-mail
> saying that the was undliverable to the people in BCC (those entered into
the
> To and CC boxes get the e-mail fine).
> I check with our domain host and ISP and neither have a small limit on how
> many e-mails we can send at a time (The domain host allows 250 and the ISP
> allows 200, I'm only trying to send 138). This seems to only be a problem
> through Outlook.
>
> Is there any advice someone can give to help me with this?

BW wrote:

> Every time I try to send a message with a BCC through Microsoft Outlook, the
> e-mail goes into the sent folder but I immedately get a respsonse e-mail
> saying that the was undliverable to the people in BCC (those entered into the
> To and CC boxes get the e-mail fine).
> I check with our domain host and ISP and neither have a small limit on how
> many e-mails we can send at a time (The domain host allows 250 and the ISP
> allows 200, I'm only trying to send 138). This seems to only be a problem
> through Outlook.
>
> Is there any advice someone can give to help me with this?

You never specified what type of mail server you are using for your outbound
e-mails. Could be SMTP. Could be Exchange. Might be Lotus-something.
I'll guess that you are using SMTP.

The SMTP mail server doesn't know or care what recipients were specified in
which *field* inside your e-mail client (and which may show in the header
section of your message). Your e-mail client compiles an aggregate list of
recipients from its To, CC, and Bcc fields. For each recipient in that
list, a separate RCPT-TO command is sent from the e-mail client to the mail
server for each recipients. If you have 10 recipients in the To field, 5 in
the CC field, and 20 in the Bcc field then 35 RCPT-TO commands get sent to
the SMTP mail host. The SMTP server has no clue as to which RCPT-TO was for
a recipient in your Bcc *field* in the UI for your e-mail client. All the
RCPT-TO commands are followed by a single DATA command that contains the
content of your message (header section, blank delimiter line, any body).
Your e-mail client will add its To and Cc fields as entries in the headers
section of your message but they are NOT used to specify the recipients of
your e-mail. That was done using the RCPT-TO commands.

Your mail server can NOT tell you that e-mails were undeliverable to just
the "people in the Bcc" field in your e-mail client. The mail server hasn't
a clue as to what recipient specified by a RCPT-TO command was in which
field inside the UI of your e-mail client. The SMTP mail server just gets a
bunch of RCPT-TO commands and none of those bother with identifying from
where that recipient got specified in your e-mail client. In fact, bulk
mailing clients have a separate mailing list (to generate the RCPT-TO
commands) from the body of the message so there is no connection to any To,
Cc, or Bcc field in the UI for the bulk mailer.

So what does the message actually say?