Re: [spamdyke-users] Graylisting delivery failure notifications

[Sam Clippinger via spamdyke-users]

That's very unusual, it sounds like a setting on their server.  It's been a 
long time, but I remember a setting on old sendmail servers that would send an 
"advisory message" if an email had been sitting in the queue too long.  It was 
just a "by the way" notice (and it always confused every user who received it), 
saying the server had failed to deliver the message so far but it would 
continue trying for X hours.  Maybe something like that is happening here -- 
the message is being stopped by graylisting but the remote server doesn't retry 
it very often, so it sits in the queue long enough to send a warning to the 
user?  I suppose you could fix it by either reducing the overall graylisting 
time on your server or by turning off graylisting for messages from their 
domain (using a configuration directory).

-- Sam Clippinger




On Aug 18, 2017, at 11:24 AM, Quinn Comendant via spamdyke-users 
 wrote:

> A client using our Spamdyke-enabled mail server has reported someone sending 
> them an email received a "bounce" message notifying the sender that the 
> messages has been graylisted (see the delivery failure notification below). 
> They did receive the message (graylisting works well for us).
> 
> This is the first time I've heard of a soft failure resulting in a 
> notification returning to the sender. If graylisting is a common practice, 
> these notifications must be terribly annoying, however the sender (from the 
> cdph.ca.gov network) seems surprised by the message. So either: A) 
> graylisting is not very common, or B) cdph.ca.gov has an uncommon setup that 
> sends annoying bounce messages.
> 
> If graylisting will result in annoying senders with delivery failure 
> notifications, I'd prefer to avoid that by disabling graylisting (doesn't 
> matter who is to blame, what the RFCs say, etc).
> 
> What do y'all think? 
> 
> Regards,
> Quinn
> 
> The delivery failure notification received:
> 
>> Hi Barb and Steph - 
>> 
>> When the email below went out yesterday, the following message was received:
>> 
>> redac...@clientdomain.org...
>> Deferred: 421 Your address has been graylisted. Try again later.
>> 
>> redac...@clientdomain.org...
>> Deferred: 421 Your address has been graylisted. Try again later.
>> 
>> Patricia 
>> Care Operations Advisor
>> Office of AIDS
>> California Department of Public Health
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[spamdyke-users] Graylisting delivery failure notifications

[Quinn Comendant via spamdyke-users]

A client using our Spamdyke-enabled mail server has reported someone sending 
them an email received a "bounce" message notifying the sender that the 
messages has been graylisted (see the delivery failure notification below). 
They did receive the message (graylisting works well for us).

This is the first time I've heard of a soft failure resulting in a notification 
returning to the sender. If graylisting is a common practice, these 
notifications must be terribly annoying, however the sender (from the 
cdph.ca.gov network) seems surprised by the message. So either: A) graylisting 
is not very common, or B) cdph.ca.gov has an uncommon setup that sends annoying 
bounce messages.

If graylisting will result in annoying senders with delivery failure 
notifications, I'd prefer to avoid that by disabling graylisting (doesn't 
matter who is to blame, what the RFCs say, etc).

What do y'all think? 

Regards,
Quinn

The delivery failure notification received:

> Hi Barb and Steph - 
> 
> When the email below went out yesterday, the following message was received:
> 
> redac...@clientdomain.org...
> Deferred: 421 Your address has been graylisted. Try again later.
> 
> redac...@clientdomain.org...
> Deferred: 421 Your address has been graylisted. Try again later.
> 
> Patricia 
> Care Operations Advisor
> Office of AIDS
> California Department of Public Health
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