Re: Some interesting greylisting graphs

Im usually fairly quiet on these posts but I just had to say it..

For us greylisting with spamassassin and razor has been the holy grail of spam filtering, my spam has been
reduced from hundreds to one or two a month.
Some older groupwise GWIA and mailing lists do not like greylisting but they can be whitelisted,
anyone that does not want to configure there mail servers to work correctly can also be whitelisted.

If you have multiple mx servers then you will need a greylist product like gps - 'greylist policy service for
postfix' that supports a database server.

As far as users are concerned they will have to wait a little longer for new mail, in most cases 5min sometimes
an hour, once the legitimate sender is in the database all future emails from that person will get straight through.

In short I highly recommend greylisting for spam reduction.

-------------------------------------------------
Stephen Carins
Network Manager
Redeemer Lutheran College
745 Rochedale Rd
Rochedale QLD 4123
Australia
Ph:   +61 7 3340 8888
Fax:  +61 7 3340 8800

Re: Some interesting greylisting graphs

Jason Parlevliet wrote:
>> Greylisting has been an utterly painless spam reduction tool in our
>> environment for the last 6 months.  As you can see from the graphs,
>> milter-greylist has  greylisted a massive number of sites, yet we've
> had
>> no reported problems with people losing mail as a result.
> 
> Good whitelists are important - I lost mail from Optusnet the first
> day...I'm using postgrey not milter, so the default whitelist may be
> different?

From milter-greylist's default whitelist:

acl whitelist addr 211.29.132.0/24    # optusnet.com.au (wierd retry
pattern)

Strangely enough, i have had postgrey running for a long time at home
(surely long enough to get email from *someone* at optusnet.com.au?),
and haven't found this to be an issue.  Maybe in recent months they've
cleaned up their act?

Paul

Jason Parlevliet wrote:
>> Greylisting has been an utterly painless spam reduction tool in our
>> environment for the last 6 months.  As you can see from the graphs,
>> milter-greylist has  greylisted a massive number of sites, yet we've
> had

Re: Some interesting greylisting graphs

Jon Smith wrote:
> Although the saving grace on this one is that if management was the one
> whingeing about the spam in the first place then they have a choice.

Nice one, Jon.  I show people those graphs and call them "the spam you
could be getting", and they become quite happy about the situation.  

Jon Smith wrote:
> Although the saving grace on this one is that if management was the one
> whingeing about the spam in the first place then they have a choice.

Nice one, Jon.  I show people those graphs and call them "the spam you
could be getting", and they become quite happy about the situation.  

Re: Some interesting greylisting graphs

Stephen Carins wrote:
> ...
> If you have multiple mx servers then you will need a greylist product like gps - 'greylist policy service
for postfix' that supports a database server.

As an aside, the small flat spot on my graphs at Mar 24 (you can see it
best on the earlier bar graphs - before i started running out of ink on
my colour printer and switched to line graphs  was caused by having
an off-site MX.  Nearly all of the spam we got during that period was
sent via that MX.  I turned it off and used just our two on-site MXs and
the graph started climbing again.

Paul

Stephen Carins wrote:
> ...
> If you have multiple mx servers then you will need a greylist product like gps - 'greylist policy service
for postfix' that supports a database server.

As an aside, the small flat spot on my graphs at Mar 24 (you can see it
best on the earlier bar graphs - before i started running out of ink on
my colour printer and switched to line graphs  was caused by having
an off-site MX.  Nearly all of the spam we got during that period was
sent via that MX.  I turned it off and used just our two on-site MXs and
the graph started climbing again.

Paul

Re: Some interesting greylisting graphs

Jason Parlevliet wrote:
> ...
> Good whitelists are important - I lost mail from Optusnet the first
> day...I'm using postgrey not milter, so the default whitelist may be
> different?

As an aside, we found we had to whitelist Telstra Bigpond as well.

Paul

Jason Parlevliet wrote:
> ...
> Good whitelists are important - I lost mail from Optusnet the first
> day...I'm using postgrey not milter, so the default whitelist may be
> different?

As an aside, we found we had to whitelist Telstra Bigpond as well.

Paul

Novell SLA Worksheet

Hello All,

Can someone please send me a copy of the SLA Worksheet. The one that
has all the prices on it.

Thanks,

Jon

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Re: Novell SLA Worksheet

Jon,
you can contact either your Novell reseller, or
<Julian_Newman <at> ocs.com>, he should be able to supply you with the
details you need.

Michael Mollard
Information Systems Administrator
molm <at> cvxmck.edu.au
Clairvaux MacKillop College
Brisbane Australia.
http://www.cvxmck.edu.au
Ph 07 33474607 (direct) / 07 33498977 
Fax 07 3349 5677

>>> 
From: 	"Jon Smith" <SmithJ <at> mbc.qld.edu.au>
To:	<novellschools <at> lists.redlands.qld.edu.au>
Date: 	2/11/2006 11:50 am
Subject: 	[NovellSchools] Novell SLA Worksheet

Hello All,

Can someone please send me a copy of the SLA Worksheet. The one that
has all the prices on it.

Thanks,

Jon

--

In case you haven't heard yet

Didn't see this one coming ..
http://online.wsj.com/public/article/SB116249026689311557-helTbrheLKgbaJ5iO5z40ZFCiOs_20061109.html?mod=blogs

Michael Mollard
Information Systems Administrator
molm <at> cvxmck.edu.au
Clairvaux MacKillop College
Brisbane Australia.
http://www.cvxmck.edu.au
Ph 07 33474607 (direct) / 07 33498977 
Fax 07 3349 5677

[Fwd: A Landmark Announcement]

I knew when i woke up today and immediately had 3 problems to deal with
that it was going to be a bad day.  I never guessed it would be *this* bad.

The beginning of the end has commenced.  What next?  Microsoft buys
Novell and releases "Microsoft/SUSE Linux"?  

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From: Ron Hovsepian <RHovsepian <at> novell.com>
Subject: A Landmark Announcement
(Continue reading)

MS & Novell Alliance - oh my...

Have a look....
http://www.novell.com/linux/microsoft/ 

Ben.

 

 
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Christian Outreach College Brisbane
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