OT postfix recipient verification

Rick Cooper rcooper at dwford.com
Wed Jan 6 20:40:14 GMT 2010


----Original Message----
From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Alex
Neuman Sent: Wednesday, January 06, 2010 3:26 PM To: MailScanner discussion
Subject: Re: OT postfix recipient verification

> **DISABLING*** verification is potentially catastrophic, as it opens the
> possibility for someone to abuse your server. I don't believe servers
> should blindly accept e-mail for their users without verifying that those
> users exist in the first place. 

Duh, now that I have pulled my head from the dark place I see I miss read
the inflection

My bad
  
> 
> On Jan 6, 2010, at 3:13 PM, Rick Cooper wrote:
> 
>>> change what the system does (by disabling recipient verification, which
>>> is potentially catastrophic).
>> 
>> Why would recipient verification be catastrophic? I would think any
>> responsible system would verify recipients before accepting the mail.
>>> 
>>> On Jan 6, 2010, at 1:10 PM, Jason Ede wrote:
>>> 
>>>> My response so far has been that they need to fix their list of email
>>>> recipients to all be valid addresses as basic maintenance anyway, but
>>>> they're worried that if someone on the To list leaves then emails will
>>>> suddenly stop coming through again. Any ways round this?
>> 
>> The way I handle these distributions within our company(s) is these
>> types of mails are sent to an alias that explodes into the actual
>> recipients. I do this for the very reason stated, it's easier for me to
>> replace someone on the alias list than manage all the points from which
>> the contact might originate. Anything that relates to say sales at abc.com,
>> service at abc.com is handled the same way.
> 
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