Outlook changes the Email account

[DavidAlgarve]

Win 7; Norton Int.Sec;both newly installed.Outlook 2007 reinstalled.
I send and receive on 3 email addresses and problem occurs randomly about
50% of time.
I send a message with my account(also the default) and immediately get a
message from "System Administrator" that "Your message did not reach some or
all of the intended recipients" and also: "The following recipient(s) cannot
be reached:" but no one is specified. It does not look like the normal
failure message from the server.
When I look at the original message in the "Sent" folder, the account has
changed to my wife's or to my anti- spam account! When I check with people,
if they have received it, their received email does have correct account but
many are not being delivered. Similar thing happens using my wife's account.
On other occasions I have sent emails around the 3 accounts and all goes
well. The ISP insist it is an Outlook problem and very often the problem does
not occur when testing with them.
How can an email change accounts between clicking on "Send" and appearing in
the "Sent" folder?

 

[Gordon]

Win 7; Norton Int.Sec;both newly installed.Outlook 2007 reinstalled.
I send and receive on 3 email addresses and problem occurs randomly about
50% of time.
I send a message with my account(also the default) and immediately get a
message from "System Administrator" that "Your message did not reach some or
all of the intended recipients" and also: "The following recipient(s) cannot
be reached:" but no one is specified. It does not look like the normal
failure message from the server.
When I look at the original message in the "Sent" folder, the account has
changed to my wife's or to my anti- spam account! When I check with people,
if they have received it, their received email does have correct account but
many are not being delivered. Similar thing happens using my wife's account.
On other occasions I have sent emails around the 3 accounts and all goes
well. The ISP insist it is an Outlook problem and very often the problem does
not occur when testing with them.
How can an email change accounts between clicking on "Send" and appearing in
the "Sent" folder?

Remove the integration of Norton with Outlook.
This may mean uninstalling and re-installing without the email scanning
function.
See if that helps.

 

[neo]

I would suspect a Norton Internet Security integration issue as Outlook
doesn't change thing on its own. The reason I say this is that some
security solutions act as a middle man between the mail client and mail
server when it comes to scanning e-mail in real-time. If you disable this
feature or temporarily uninstall Norton, does the behavior stop?