Hide attachment...

  • Thread starter Heinz-Josef Bomanns
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Heinz-Josef Bomanns

Hi,

i have to send an 'invisible' attachment with a mail in plain text (or

other) format. Currently i'm using

'Add hidden attachment

objAtt = .Attachments.Add(strFileName, olByValue, 0, "Hidden")

I've also tried Redemption.MAPIUtils like this:

'Set PR_ATTACHMENT_HIDDEN = True

> .HrSetOneProp objAtt.MAPIOBJECT, &H7FFE000B, True

In my outbox the attachment is hidden and PR_ATTACHMENT_HIDDEN is

true, after the mail is sent and received on other machines the

attachment is sometimes visible and PR_ATTACHMENT_HIDDEN is missing,

sometimes it's invisible with PR_ATTACHMENT_HIDDEN = True present.

It's not depending on a specific Outlook version - in my VMs or VPCs

with Outlook 2002, 2003, 2007 the attachments are always invisible, on

the machine of friend "A" with 2002 and friend "B" with 2007 the

attachment is visible, on the machine of friend "C" with 2003 and 2007

the attachment is invisible. Wired... Anybody any idea, why the

attachment stays invisible on some installations and gets visible on

others? Thanks for any hint...

So long...

 
Last edited by a moderator:
In general, that property on the attachment is set by Outlook depending on

what outlook thinks that attachment is (such as an image used by the HTML

body).

Have you tried to set the PR_ATTACH_CONTENT_ID and/or

PR_ATTACH_CONTENT_LOCATION properties to trick Outlook into thinking that it

is an imahe used by the HTML body?

Dmitry Streblechenko (MVP)

 
Last edited by a moderator:
Hallo Dmitry,

I set PR_ATTACH_CONTENT_ID, PR_ATTACH_CONTENT_LOCATION and

PR_ATTACHMENT_HIDDEN - on the sent mail this properties are present,

but on the destination machine after receiving the mail all this

properties are missing, so it looks like some Outlook installations

are deleting them when receiving the mail...

So long...
 
Last edited by a moderator:
Hi,

are you sure that these properties are set by Outlook? I don't think so, at

least in some cases - i have send email(multipart/related , html) to my

exchange server and when I discover my Inbox using MFCMAPI tool I see that

PR_ATTACHMENT_HIDDEN property is set to true already(I suppose that MFCMAPI

app keep message intact and just shows its props).

In case i send the same mail to hMail server and view this mail using

outlook i see all attachments, i.e PR_ATTACHMENT_HIDDEN property is set to

false.

So my conclusion is that MS exchange server may mark some attachments as

hidden...
 
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