Do your logs show that you are sending it twice?
Note that duplicates are always possible with SMTP and there is nothing
you can do about it. One scenario is simply that the other end sends back
a 250 OK which your end never sees. What does your end do? Resend as it must.
Ultimately only the receiver knows if it has a duplicate. What if a person is
subscribed with multiple addresses? What if a subscriber address is an exploder?
Regards.
On Mon, Jan 24, 2000 at 12:38:09PM -0500, Kevin Lee wrote:
> Hi,
>
> We use qmail to send out large subscriber emagazine/newsletter mailings (2
> million messages/week), and we seem to have a problem with some subscribers
> getting duplicates. I have seen fixes for duplicates on inbound mail, but
> does anyone know how to address our problem on outbound mail. Onelist and
> Hotmail don't seem to have a dupe problem.
>
> The problem is sporadic and unpredictable.
>
> Sometimes the duplicates have the same time stamp, and other times they are
> separated by an hour (message sent back into the cue as undelivered?).
>
> Any thoughts?
>
>
> Kevin Lee
> TeamINTERACT
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