Duplicating Zenys - MailBox

Originally posted by [b]ADMProfessor[/b]
http://www.eathena.ws/board/index.php?autocom=bugtracker&showbug=2638

Hi !!!
I had a big problem with ppl duping items because of the @mail comand.
Decided to take it out and now ppl can only acess mail box using Mail Box NPC.

The problem is, someone in my server still able to dup ZENY.
Exemple in my logs:

10982, '2009-01-04 23:04:24', 151243, 151243, 'E', -2099000, 'payon'
10985, '2009-01-04 23:05:57', 151243, 151243, 'E', 2099000, 'payon'
11018, '2009-01-04 23:14:56', 151243, 151243, 'E', -4198000, 'payon'
11028, '2009-01-04 23:16:42', 151243, 151243, 'E', 4198000, 'payon'
11047, '2009-01-04 23:19:51', 151243, 151243, 'E', -8397000, 'payon'
11053, '2009-01-04 23:21:03', 151243, 151243, 'E', 8397000, 'payon'
11081, '2009-01-04 23:26:06', 151243, 151243, 'E', -16793000, 'payon'
11091, '2009-01-04 23:27:27', 151243, 151243, 'E', 16793000, 'payon'
11119, '2009-01-04 23:31:58', 151243, 151243, 'E', -33588000, 'payon'
11124, '2009-01-04 23:33:14', 151243, 151243, 'E', 33588000, 'payon'

As you can see, it uses email to dup, i have nooooooo idea how.
Only know that this guy uses mail to do it

any idea ??!?!?!?!?!?
that is a very serious bug !!! hope you can help us out!

EDIT2:
i am still trying to find the problem... just realize one thing.
I tried send email to myselft, it does not work!
So, how is this guy sending him email to himself PLUS look the time when se lost zeny and when he get the zeny back.
Its about 1 min and half all the time.

When i sent mail to myselft, server take zeny and give zeny back in the same SECOND.
So he is really doing something...

EDIT3:
Okkkk got more info !!
Guy have a char 01. He send xxxx zeny to char number 2.
Logoff.
Login in char2, and just return email to char1. HERE i dont know if he did something, i guess so!
char2 logoff.
char1 login back again and get his returned email.
Thats why the logs shows
he sent email to him self. after 1min and half he get another email with a positive amount of zeny, from himself again.

The thing is that when he send email to char2 and get it back he duplicate his zenys, but HOWWWWWWWWWWW... :/
If i get more info, i will come back.

This post has been edited by olivete: Jan 7 2009, 03:01 PM