[Mimedefang] Seeing weird SMFI errors

Philip Prindeville philipp_subx at redfish-solutions.com
Tue Aug 4 20:04:32 EDT 2015

On 08/04/2015 02:11 PM, Dianne Skoll wrote:
> On Tue, 4 Aug 2015 14:45:42 -0400
> "Kevin A. McGrail" <KMcGrail at pccc.com> wrote:
>> On 8/4/2015 2:02 PM, Philip Prindeville wrote:
>>> Is there any other way to figure out if this is HELO that follows a
>> Save state and re-call the helo check again in filter_sender, perhaps?
> This is why I resisted even adding a filter_helo callback.  It's
> basically useless.  Anything you can do in filter_helo might as well
> be deferred to filter_sender.
> If an SMTP client connects, says EHLO and then closes the connection...
> do we really care?
> Regards,
> Dianne.

Potentially, yes...  If it's doing a denial of service attack I might 
want to notice the rate of incoming connections, save them into a .db 
file, and start blocking them in filter_relay() as a way to rate-limit.


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