Outlook send duplicate mails

[Mahesh]

Hi All,
There are 2 email accounts configured under single profile on two
computers(same accounts).On both machines outlook is opened with the
specified profile.Our mapi plugin also installed on these machines.

Now if a user sends mail from this machine,receiver gets it twice.

Our plugin does not pay any role throughout the process.

what is the problem of this scenario?

please give me any clue to get rid of this problem..

 

[Ken Slovak - [MVP - Outlook]]

Using email anti-virus scanning? That is known to cause that. If so disable
it, it's not needed at all.

If that's not it then does this happen if your addin is not loaded? If not,
then your addin is doing something after all.