Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread @lbutlr
On 01 Aug 2016, at 11:02, Matus UHLAR - fantomas wrote: >> On 31 Jul 2016, at 22:12, Benny Pedersen wrote: >>> i bet greylist is cough invalid mailservers at the doorstep, it could be >>> that postscreen is bad aswell ? > > On 01.08.16 07:46, @lbutlr wrote: >> Sure, if by “invalid” you mean Ama

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Reindl Harald
Am 02.08.2016 um 00:05 schrieb Benny Pedersen: On 2016-08-01 19:02, Matus UHLAR - fantomas wrote: while we're at it, I really don't understand why they do it like this. what's the point behind changing IP address after each delivery attempt? goal is to expose more networks ips to be blocked

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Benny Pedersen
On 2016-08-01 19:18, Larry Rosenman wrote: Shared outbound spool, and the next available host sends it. next host start a new greylist time frame to delay again It's not nefarious, just load balancing. yes misunderstanding what not to do

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Benny Pedersen
On 2016-08-01 19:02, Matus UHLAR - fantomas wrote: while we're at it, I really don't understand why they do it like this. what's the point behind changing IP address after each delivery attempt? goal is to expose more networks ips to be blocked at the recipient server for abuse, ironical :)

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Reindl Harald
Am 01.08.2016 um 23:36 schrieb sha...@shanew.net: Others could probably add to that list, but that's just off the top of my head. But, even if a spam source retries and successfully makes it past the greylisting, the greylisting still provides potential benefits, like: - While it was waiting

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread shanew
On Sun, 31 Jul 2016, Robert Schetterer wrote: Greylisting was invented as an idea against bots. Its based on the idea that bots "fire and forget" when they see a tmp error and dont get back. But thats historic, bots are recoded, better antibot tecs were invented. The only problem now is people

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Vincent Fox
I have greet_pause long ago enabled in sendmail. Out of 1,112,871 messages yesterday only 1096 tripped greet_pause. If it occasionally trips up a miscoded client I tell them to fix it or stop using and am happy that this tiny effort made the internet a slightly saner place. But it's not in t

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Axb
On 01.08.2016 21:30, Vincent Fox wrote: I keep seeing people say "well if you have postscreen, greylisting is just dumb". Well what is the equivalent for other MTA? google for "Greet pause" and "Early talker" afaik there's implementations for Sendmail and Haraka. There may be something simi

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Vincent Fox
I keep seeing people say "well if you have postscreen, greylisting is just dumb". Well what is the equivalent for other MTA? I still see a lot of spambots on PBL hosts, that never contact again. So the blanket statement "bots are recoded" just doesn't jibe with what I see. Maybe you could ma

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Reindl Harald
Am 01.08.2016 um 19:02 schrieb Matus UHLAR - fantomas: On 31 Jul 2016, at 22:12, Benny Pedersen wrote: i bet greylist is cough invalid mailservers at the doorstep, it could be that postscreen is bad aswell ? On 01.08.16 07:46, @lbutlr wrote: Sure, if by “invalid” you mean Amazon, most bank

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Larry Rosenman
On 2016-08-01 12:02, Matus UHLAR - fantomas wrote: On 31 Jul 2016, at 22:12, Benny Pedersen wrote: i bet greylist is cough invalid mailservers at the doorstep, it could be that postscreen is bad aswell ? On 01.08.16 07:46, @lbutlr wrote: Sure, if by “invalid” you mean Amazon, most banks, seve

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Matus UHLAR - fantomas
On 31 Jul 2016, at 22:12, Benny Pedersen wrote: i bet greylist is cough invalid mailservers at the doorstep, it could be that postscreen is bad aswell ? On 01.08.16 07:46, @lbutlr wrote: Sure, if by “invalid” you mean Amazon, most banks, several airlines, large mail services, and many many o

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Ryan Coleman
> On Aug 1, 2016, at 10:15 AM, Benny Pedersen wrote: > >>> >>> i bet greylist is cough invalid mailservers at the doorstep, it could be >>> that postscreen is bad aswell ? >> Sure, if by “invalid” you mean Amazon, most banks, several airlines, >> large mail services, and many many others. > >

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread Benny Pedersen
On 2016-08-01 15:46, @lbutlr wrote: Where did you get the idea that postfix will not deliver later? i did not say that i bet greylist is cough invalid mailservers at the doorstep, it could be that postscreen is bad aswell ? Sure, if by “invalid” you mean Amazon, most banks, several airline

Re: Is greylisting effective? (was Re: Using Postfix and Postgrey - not scanning after hold)

2016-08-01 Thread @lbutlr
On 31 Jul 2016, at 22:12, Benny Pedersen wrote: > On 2016-08-01 05:55, @lbutlr wrote: >> On 31 Jul 2016, at 01:06, Robert Schetterer wrote: >>> But thats historic, bots are recoded, better antibot tecs were invented. >>> The only problem now is people still believe in historic stuff. >> Yeah, tha

Re: false possitive

2016-08-01 Thread bOnK
Please send me a sample of whatever it is you are smoking! -- b. On 1-8-2016 11:23, Benny Pedersen wrote: On 2016-08-01 11:07, bOnK wrote: On 31-7-2016 22:16, Benny Pedersen wrote: dovecot.org working on there own problem with 3.3.1 Maybe you meant this as a follow-up on thread "dovecot runs

Re: false possitive

2016-08-01 Thread Benny Pedersen
On 2016-08-01 11:07, bOnK wrote: On 31-7-2016 22:16, Benny Pedersen wrote: dovecot.org working on there own problem with 3.3.1 Maybe you meant this as a follow-up on thread "dovecot runs on a pbl fun aside, i have it much more fun with a raspberri pi as full-hd shell terminal listed ip ?"

Re: false possitive

2016-08-01 Thread bOnK
On 31-7-2016 22:16, Benny Pedersen wrote: dovecot.org working on there own problem with 3.3.1 Maybe you meant this as a follow-up on thread "dovecot runs on a pbl listed ip ?" on the dovecot list? wake up ;-) -- b.