MAPI - not everyone receives the attachment

[robinvb]

We have a program (developed in Clarion, sold to clients), that has an
email functionality (submit Request for Quotes, etc.). By default, our
clients can set up their email settings as SMTP, but it also supports MAPI
as not every mailserver allows SMTP. MAPI is behaving weird though:

The email is plain text, and contains one PDF attachment (about 200 kb).
There is one email address in the "TO"-field (us), and all the recipients
are in the "BCC"-field (suppliers).

Some suppliers (about 50%) do not receive the attachment, and there is no
notification in the body of the email. If then I go to Outlook, Sent Items
folder, and reopen the email, all recipients are there. If I say "resend",
they all receive it fine.

We just call the MAPI component, so I believe our software is fine. What
could this be?

Thanks!

[David Tracy]

What version of the GroupWise code are you running against? Versions of
GroupWise before 7.0 have many problems in their MAPI support. Novell has
fixed many defects in the MAPI code in version 7.0. Even more problems have
been fixed in the upcoming 7.0.1 release. I encourage running your MAPI code
against the 7.0 or greater version of GroupWise.

However, if your code is running against 7.0 and still demonstrates the
problem, GroupWise Engineering has a few questions. Do you have a small test
program that demonstrates the problem? Is so, our development team can start
debugging quickly. If you don't have a test program, the development team
would need to know a few more things about your program flow. First, are you
using Simple MAPI or Extended MAPI? What are the exact MAPI calls you make
to send this Email and attachment?

Post by robinvb

On Wednesday, February 15, 2006 at 2:27 AM, in message

We have a program (developed in Clarion, sold to clients), that has an
email functionality (submit Request for Quotes, etc.). By default, our
clients can set up their email settings as SMTP, but it also supports MAPI
The email is plain text, and contains one PDF attachment (about 200 kb).
There is one email address in the "TO"-field (us), and all the recipients
are in the "BCC"-field (suppliers).
Some suppliers (about 50%) do not receive the attachment, and there is no
notification in the body of the email. If then I go to Outlook, Sent Items
folder, and reopen the email, all recipients are there. If I say "resend",
they all receive it fine.
We just call the MAPI component, so I believe our software is fine. What
could this be?
Thanks!