Re: Hot do I stop becoming a spam relay.

Jeff,

Looking at the e-mail in a bit more detail, I may be wrong
and it is not 
Bcc. For the last 24hours I have had about
1000 postmaster return messages and at first I thought we
were the 
sender of the original spam e-mail, but after some
more checking I relise that it is just our domain being used
as the 
sender address.
So, at least we are not be the sender, just the one being
used as the 
 From header.

Going back to my original e-mail. I just checked. I logged
onto 
gmail.com and did the following:
       From:     Megmail.com
       To:        NoSuchUseryahoo.co.uk
       Bcc:      medcs.bbk.ac.uk (Work Address)

And I got the e-mail at my work address? So, Why did I get
it?

Andrew

>On 11 Mar 2007 at 14:35, Andrew Watkins wrote:
>
>  
>
>>Hi!
>>First of all my sendmail does not allow relaying,
but I am now getting a 
>>lot of e-mail where email is sent to an unknown
local user and then 
>>there is a BCC to some other location:
>>for example:
>>    From: spammerdomain.com
>>    TO:    XXXourlocal.domain.com
>>    Bcc:   someoneexternal.com
>>
>>I guess the letter of the of the law I should
deliver the e-mail, to the 
>>external address, since typo 's do happen, but there
must be away round 
>>it. May be I could not deliver Bcc if the to address
is invalid?
>>    
>>
>
>First, if there is a "Bcc:" header in the
incoming SMTP data, the  
>server at the other end screwed up...the whole point of
"Bcc:" is that 
>other recipients aren't supposed to know about it.
>
>Second, sendmail doesn't deliver based on headers from
SMTP data...it 
>delivers based on the "RCPT To:" command in
the SMTP transaction.  So, 
>whatever might be in a "Bcc:" header isn't
going to do anything.
>
>Now, if you have some program to deliver the e-mail
locally that looks 
>at headers and creates a new e-mail message if there is
a "Bcc:" 
>header, then that's the problem.
>
>"sendmail -t" is an example of a command that
does this sort of header 
>parsing.  It's really only used for initiation of
sending mail, and I 
>think it's ignored when in daemon mode, but check to see
if you are 
>starting your daemon with this flag, just in case.
>
>  
>
_______________________________________________
NOTE: If there is a disclaimer or other legal boilerplate in
the above
message, it is NULL AND VOID.  You may ignore it.

Visit http://www.mimedefang.org and http://www.roaringpengu
in.com
MIMEDefang mailing list MIMEDefanglists.roaringpenguin.com
http://lists.roaringpenguin.com/mailman/listinfo/mime
defang

Re: Hot do I stop becoming a spam relay.

Thread: Re: Hot do I stop becoming a spam relay.