[Mailman-Users] Mailman Hosting
odhiambo at gmail.com
Fri Dec 23 14:24:58 EST 2016
Okay, so Exim and Postfix act the same in their default configs unless one
changes it. Mark (Dale), does your Postfix act the same way? I think it
doesn't and maybe it's something you need to take a second look at??
On 23 December 2016 at 22:17, Richard Shetron <guest2 at sgeinc.com> wrote:
> Postfix is the same. I had to install a greylisting package to add
> greylisting to postfix.
> On 12/23/2016 9:50 AM, Odhiambo Washington wrote:
>> On 23 December 2016 at 17:36, Richard Shetron <guest2 at sgeinc.com
>> <mailto:guest2 at sgeinc.com>> wrote:
>> Maybe they were using some type of grey listing.
>> For those who don't know:
>> Grey listing is where the target MTA rejects with a retry error code
>> the email from a new source for some period of time. Every site can
>> set their own delay. Most spammers won't retry so it gets rid of a
>> lot of spam. Real email servers will accept the retry error (4xx)
>> and retry after some prefigured time from a few seconds to an hour
>> or more. The IP addresses are tracked and if retried after the time
>> limit are white listed for anywhere from a few hours to a month or
>> I know Exim will only treat a session as a failure if it gets 5xx. Does
>> Postfix do the same?
>> Best regards,
>> Odhiambo WASHINGTON,
>> +254 7 3200 0004/+254 7 2274 3223
>> "Oh, the cruft."
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft."
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