Re: [exim] Weird RCPT TO address

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Aihe: Re: [exim] Weird RCPT TO address
Wakko Warner wrote:
> Mark Smith wrote:
>>>Subject: [exim] Weird RCPT TO address
>>>
>>>a1aaa1azzzz1zaaaaa@<local domain>
>>>
>>>Anyone else seeing this?
>>
>>Yes, coming from a variety of zombies.
>
>
> I just recently started seeing this. Wondering if this was due to spammers
> trying to exploit servers that accept/bounce.
>


Probably. Default exchange(2k) behaviour is to still accept the mail and then
bounce it if it can't deliver it anywhere. I've had hits on a number of servers..

2005-07-27 15:43:04 H=(200-101-188-071.cbrbr200.dial.brasiltelecom.net.br)
[200.101.188.71] F=<ceosg@???> rejected RCPT
<a1aaa1azzzz1zaaaaa@???>: Unknown user

Also the exact same local part so they're all going to be from the one bot net.

Ted.