[imp] Muiltiple copies of same message sent by IMP

[Fredrik Haglund]

Hi!

I receive complatints from my users that they receive multiple copies  
of the same message. In all cases it appears that the sender is using  
IMP for composing.

I can find multiple post in the access_log and maillog indicating that  
it the same message is actually posted several times to server from  
the browser.

Is this a correct analysis?

Could it be a "feature" of the browser to try to resend to recover  
from timeouts or network problems? Or is it related to javascript? I  
doubt that the user manages to click on the send button that many times.


Main question is: Can IMP (compose.php?) be improved to prevent the  
same message from being sent several times?

Kind regards,
Fredrik Haglund,
Sweden


access_log:
212.151.252.253 - - [26/Apr/2006:22:05:28 +0200] "POST  
/horde/imp/compose.php?uniq=18mqhdmzlmps HTTP/1.1" 200 4995  
"http://webmail.stockholmpride.org/horde/imp/compose.php?
actionID=reply&index=1005&identity=0&array_index=85&thismailbox=INBOX&uniq=1146081544436" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT  
5.1)"
212.151.252.253 - - [26/Apr/2006:22:05:28 +0200] "POST  
/horde/imp/compose.php?uniq=18mqhdmzlmps HTTP/1.1" 200 73  
"http://webmail.stockholmpride.org/horde/imp/compose.php?ac
tionID=reply&index=1005&identity=0&array_index=85&thismailbox=INBOX&uniq=1146081544436" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT  
5.1)"
(REPEATED 9 TIEMS - during 2 seconds)

maillog:
Apr 26 22:05:29 www qmail: 1146081929.017970 new msg 6734278
Apr 26 22:05:29 www qmail: 1146081929.018134 info msg 6734278: bytes  
6220 from <a.s at stockholmpride.org> qp 29584 uid 2020
Apr 26 22:05:29 www qmail: 1146081929.048572 starting delivery 5419:  
msg 6734278 to local 2-i.n at stockholmpride.org
Apr 26 22:05:29 www qmail: 1146081929.048851 status: local 1/10 remote 0/20
Apr 26 22:05:29 www qmail: 1146081929.182496 delivery 5419: success:  
did_1+0+1/
Apr 26 22:05:29 www qmail: 1146081929.182559 status: local 0/10 remote 0/20
Apr 26 22:05:29 www qmail: 1146081929.182596 end msg 6734278
Apr 26 22:05:29 www qmail: 1146081929.520894 new msg 6734278
Apr 26 22:05:29 www qmail: 1146081929.520990 info msg 6734278: bytes  
6220 from <a.s at stockholmpride.org> qp 29596 uid 2020
Apr 26 22:05:29 www qmail: 1146081929.528803 starting delivery 5420:  
msg 6734278 to local 2-i.n at stockholmpride.org
Apr 26 22:05:29 www qmail: 1146081929.528835 status: local 1/10 remote 0/20
Apr 26 22:05:29 www qmail: 1146081929.566200 delivery 5420: success:  
did_1+0+1/
Apr 26 22:05:29 www qmail: 1146081929.566420 status: local 0/10 remote 0/20
Apr 26 22:05:29 www qmail: 1146081929.566473 end msg 6734278
Apr 26 22:05:30 www qmail: 1146081930.272686 new msg 6734278
Apr 26 22:05:30 www qmail: 1146081930.272811 info msg 6734278: bytes  
6220 from <a.s at stockholmpride.org> qp 29613 uid 2020
Apr 26 22:05:30 www qmail: 1146081930.280561 starting delivery 5421:  
msg 6734278 to local 2-i.n at stockholmpride.org
(REPEATED 9 TIMES)


Platform info
=============
Fedora Core 2
Apache/2.0.51 (Fedora)
PHP Version 4.3.10
(imp) H3 (4.1)
(horde) 3.1.1