Re: Initial 220 greeting timeout

2012-12-03 Thread Stan Hoeppner
On 12/2/2012 1:20 PM, Alex wrote: > Thanks for the explanation. Trying to do too many things at once. You > probably think I'm an idiot by now. You're welcome. I understand that completely. No, not at all. >> Dropping SMTP packets should be done with care. If you FP on an email >> to the CEO

Re: Initial 220 greeting timeout

2012-12-02 Thread Alex
Hi, >>> Again, the IP in question will never be listed in the PBL. SBL maybe, >>> PBL no. Might be time to brush up on Spamhaus various lists and their >>> criteria. >> >> Yes, I didn't fully understand that dynamics aren't listed in the PBL. ... > The SBL is where you'll find snowshoe IPs liste

Re: Initial 220 greeting timeout

2012-11-27 Thread Stan Hoeppner
On 11/27/2012 2:51 PM, Alex wrote: > Stan, > >>> Right, that makes sense. A spammer wouldn't have access to a >>> consecutive block of dynamic IPs, like from a cable company or >>> Verizon. It still could mean that it's listed in the PBL by now, >>> though. >> >> Again, the IP in question will nev

Re: Initial 220 greeting timeout

2012-11-27 Thread Alex
Stan, >> Right, that makes sense. A spammer wouldn't have access to a >> consecutive block of dynamic IPs, like from a cable company or >> Verizon. It still could mean that it's listed in the PBL by now, >> though. > > Again, the IP in question will never be listed in the PBL. SBL maybe, > PBL no

Re: Initial 220 greeting timeout

2012-11-23 Thread Stan Hoeppner
On 11/22/2012 12:39 PM, Alex wrote: > Hi, > >>> I'm sure by now it's in the PBL or SBL. >> >> This is a bad assumption. The PBL lists dynamics/etc, not snowshoe IPs. > > Right, that makes sense. A spammer wouldn't have access to a > consecutive block of dynamic IPs, like from a cable company or

Re: Initial 220 greeting timeout

2012-11-22 Thread Alex
Hi, >> I'm sure by now it's in the PBL or SBL. > > This is a bad assumption. The PBL lists dynamics/etc, not snowshoe IPs. Right, that makes sense. A spammer wouldn't have access to a consecutive block of dynamic IPs, like from a cable company or Verizon. It still could mean that it's listed in

Re: Initial 220 greeting timeout

2012-11-22 Thread Stan Hoeppner
On 11/22/2012 2:24 AM, Jamie Paul Griffin wrote: > Hi Stan, can I ask: what is a "Snowshoe" domain? It's a domain that wears these: http://blog.mlive.com/outdoors_impact/2009/03/large_1snowshoe07.jpg -- Stan

Re: Initial 220 greeting timeout

2012-11-22 Thread Michael P. Demelbauer
On Thu, Nov 22, 2012 at 08:24:16AM +, Jamie Paul Griffin wrote: > Hi Stan, can I ask: what is a "Snowshoe" domain? http://blog.wordtothewise.com/2009/10/spamhaus-vs-snowshoe-spammers/ -- Michael P. Demelbauer Systemadministration WSR Arsenal, Objekt 20 1030 Wien --

Re: Initial 220 greeting timeout

2012-11-22 Thread Jamie Paul Griffin
[ Stan Hoeppner Wrote On Thu 22.Nov'12 at 8:19:21 GMT ] > On 11/21/2012 7:01 PM, Alex wrote: > > > I pulled the IPs out of the logs for these 'lost connection' errors > > over the last 24hrs, and it does appear that there are multiple IPs in > > the same network losing the connection. This also

Re: Initial 220 greeting timeout

2012-11-22 Thread Stan Hoeppner
On 11/21/2012 7:01 PM, Alex wrote: > I pulled the IPs out of the logs for these 'lost connection' errors > over the last 24hrs, and it does appear that there are multiple IPs in > the same network losing the connection. This also doesn't really prove > much, but there are cases where there are doz

Re: Initial 220 greeting timeout

2012-11-21 Thread Wietse Venema
Alex: > Nov 21 19:39:14 mail01 postfix/postscreen[9111]: PASS OLD > [198.41.120.10]:47864 > > They were later all tagged as spam, but it would definitely be nice to > be blocking these outright with postscreen. I've now added an iptables Postscreen "forgets" DNSBL lookup results after one hour.

Re: Initial 220 greeting timeout

2012-11-21 Thread Alex
Hi, >>> Nov 19 20:39:03 mail01 postfix/smtpd[19820]: lost connection after >>> CONNECT from listserver.translateplanmulti.info[198.41.120.7] >> >> Your server is too slow, so that connections pile up in front of >> it. > > translateplanmulti.info is a snowshoe domain, 198.41.120.0/24, and > everyo

Re: Initial 220 greeting timeout

2012-11-21 Thread Stan Hoeppner
On 11/20/2012 6:06 AM, Wietse Venema wrote: > Alex: >> Nov 19 20:39:03 mail01 postfix/smtpd[19820]: lost connection after >> CONNECT from listserver.translateplanmulti.info[198.41.120.7] > > Your server is too slow, so that connections pile up in front of > it. translateplanmulti.info is a snows

Re: Initial 220 greeting timeout

2012-11-20 Thread Wietse Venema
Alex: > Nov 19 20:39:03 mail01 postfix/smtpd[19820]: lost connection after > CONNECT from listserver.translateplanmulti.info[198.41.120.7] Your server is too slow, so that connections pile up in front of it. Find out where the bottle neck is by SYSTEMATICALLY MEASURING latency (not: manual "teln