Block messages with "null" sender

[Joao Gazzoni <jo...@banrisul.com.br>]

Hello,

Does anyone know how to block messages that come with a blank
sender address in the "from" field, like "from=<>" ?

We are using SA with MailScanner.

Thanks for any suggestion.

Re: Block messages with "null" sender

[Matt Kettler <mk...@evi-inc.com>]

Joao Gazzoni wrote:
> Hello,
> 
> Does anyone know how to block messages that come with a blank
> sender address in the "from" field, like "from=<>" ?
> 
> We are using SA with MailScanner.
> 
> Thanks for any suggestion.
> 

I'd suggest reading some of the RFC's referenced at:

http://www.rfc-ignorant.org/policy-dsn.php

Re: Block messages with "null" sender

[jplesset <ja...@dp-design.com>]

Yeah, the reason not to block such is that DSN (Delivery Status 
Notifications) are supposed to come in this way.  If you block such, 
your users will not be happy ... .

jay

Craig Jackson wrote:

> Joao Gazzoni wrote:
>
>> Hello,
>>
>> Does anyone know how to block messages that come with a blank
>> sender address in the "from" field, like "from=<>" ?
>>
>> We are using SA with MailScanner.
>>
>> Thanks for any suggestion.
>
>
> That's funny. There was just recently a big flame war on the Exim list 
> about this topic. I wouldn't do this at the SA or Mailscanner level. 
> What MTA are you using?
> Craig
>

Re: Block messages with "null" sender

[Craig Jackson <cj...@localsurface.com>]

Joao Gazzoni wrote:
> Hello,
> 
> Does anyone know how to block messages that come with a blank
> sender address in the "from" field, like "from=<>" ?
> 
> We are using SA with MailScanner.
> 
> Thanks for any suggestion.

That's funny. There was just recently a big flame war on the Exim list 
about this topic. I wouldn't do this at the SA or Mailscanner level. 
What MTA are you using?
Craig