Re: [Sqlgrey-users] Auto-whitelisting recipient email addresses

[Lionel B. <lio...@bo...>]

Hi Bruce,

On 07/03/15 18:13, Bruce Bodger wrote:
> Good day,
>
> I'm wondering how many of you have implemented the sqlgrey mod described 
> here...  http://www.hyllander.org/sqlgrey_whitelisting It's not very 
> often that I receive a call from a customer informing me that the email 
> that he attempted to send to us resulted in an error message  (from his 
> perspective).  And the last time was when he was replying to a message 
> that I sent to him!  Of course, the "auto-whitelisting of recipient 
> addresses" wouldn't help a bit until someone in my domain writes to a 
> customer but it might add an additional layer of automation. I realize 
> that the problem relates to broken mail servers but it's our customers 
> who are inconvenienced and our business that might suffer.

It's unlikely your business will suffer: if your customer reports this
kind of errors, he probably have them with multiple other destinations
(unless his/her admin was temporarily playing with parameters of the
mail server) as greylisting and temporary errors are commonplace.

If you aren't prepared to explain that everything is fine there is
support for whitelisting your customer mail servers (instead of his
domain or addresses as implemented in the patch above which would make
easy to circumvent greylisting by simply using fake addresses derived
from your known customers).
Just add entries to /etc/sqlgrey/clients_fqdn_whitelist.local or
/etc/sqlgrey/clients_ip_whitelist.local depending on how you want to
whitelist (by fqdn or ip). You don't have to restart SQLgrey, these
files are automatically reloaded when modified.

Best regards,

Lionel