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Content-description: Today's Topics (17 msgs)
Today's Topics:
1. Re: Hiding auth. password (Tamas TEVESZ)
2. RBL (j.linn)
3. Re: Exim 3.22 leaking file handles? (Philip Hazel)
4. Re: RBL (Suresh Ramasubramanian)
5. Re: RBL (Philip Hazel)
6. Re: RBL (j.linn)
7. Re: Exim 3.22 leaking file handles? (Peter Galbavy)
8. Re: Exim vs sendmail vs PostFix vs Qmail (Malcolm Beattie)
9. Re: Exim 3.22 leaking file handles? (John Horne)
10. Re: Exim vs sendmail vs PostFix vs Qmail (Nigel Metheringham)
11. exiscan and delivery process explosion (Graeme Wilford)
12. Re: Exim vs sendmail vs PostFix vs Qmail (michael@???)
13. v3.15 (kuksi)
14. Re: Exim vs sendmail vs PostFix vs Qmail (Malcolm Beattie)
15. Re: Exim vs sendmail vs PostFix vs Qmail (Malcolm Beattie)
16. Re: exiscan and delivery process explosion (Tom Kistner)
17. Rejecting EMail (Gordon McKee)
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--__--__--
Message: 1
Date: Thu, 19 Apr 2001 13:04:58 +0200 (CEST)
From: Tamas TEVESZ <ice@???>
To: Jean-Noel Colin <jn.colin@???>
cc: <exim-users@???>
Subject: Re: [Exim] Hiding auth. password
In-Reply-To: <E14qC2Q-0001BX-00@strider>
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On Thu, 19 Apr 2001, Jean-Noel Colin wrote:
> I am a bit worried because this requires that my NT password
> is stored in plain text in exim.conf and that any user can run
> exim -bP authenticators and find out the username/password used
>
> Is there any solution to this?
as i said previously
hide client_send = username : password
$ exim -bP authenticators
login authenticator:
driver = plaintext
public_name = LOGIN
client_send = <value not displayable>
this option came in somewhere between 3.16 and 3.22 i think
also make sure normal users can't read exim.conf directly (ie 640
root.mail or sg like that)
--
[-]
[Szilva] eppen szolt bx hogy szolt neked hogy szoltam neki
[bx] varja. szolok szilvanak, hogy szoltal nekem, hogy szoltam
neki, hogy ... varj. elb*sztam
--__--__--
Message: 2
Date: Thu, 19 Apr 2001 12:26:30 +0100 (BST)
From: "j.linn" <sys044@???>
To: exim-users@???
Message-ID: <Pine.SOL.4.21.0104191222000.11448-100000@???>
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Subject: [Exim] RBL
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It looks like the RBL DNS site names have changed although the old ones
still work. Perhaps the RBL documentation should be changed to reflect
this
blackholes.mail-abuse.org
relays.mail-abuse.org
dialup.mail-abuse.org
I initially thought I hade found a new anti-spam facility but it's just a
name change.
If anyone has any anti-SPAM set up e.g. a translation of the procmail spam
bouncer to EXIM filter, or some other EXIM filter system could they let me
know (OFF_LINE as this has been on the list before)
John Linn
--__--__--
Message: 3
Date: Thu, 19 Apr 2001 12:38:06 +0100 (BST)
From: Philip Hazel <ph10@???>
To: Florian Laws <fl@???>, John Horne <J.Horne@???>
cc: <exim-users@???>
Subject: Re: [Exim] Exim 3.22 leaking file handles?
In-Reply-To: <XFMail.010419114916.john@???>
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On Thu, 19 Apr 2001, Florian Laws wrote:
> I have problems with Exim 3.22 which seems to leak
> file handles on two Linux machines:
> #1: SuSE Linux 6.2, Kernel 2.2.18, glibc 2.1.1,
> one IDE disk
> #2: SuSE Linux 6.4, Kernel 2.2.16 + raid patches,
> glibc 2.1.3, two SCSI disks as software RAID.
>
> Under heavy load, both machines seem to run out of
> available file descriptors, no processes can run anymore
> because of that.
Well, Exim is implemented mainly in short-lived processes. The daemon is
the only long-lived process, and its code has been extremely stable for
a very long time, so I doubt very much whether it would leak file
handles[*]. Every other Exim process lives for only a short time.
Therefore, I find it hard to believe that Exim as a whole could leak
file handles. Of course, if the system is very busy and there are
zillions of Exim processes, they may try to use a large number at once.
On Thu, 19 Apr 2001, John Horne wrote:
> On 19-Apr-01 at 10:32:26 Florian Laws wrote:
> > One error message of exim itself:
> > 2001-04-19 11:37:15 14qAsF-0000V4-01 exec of
> > exim -Mc failed: Too many open files in system
> >
> I could be wrong here, but you may want to look at the 'lookup_open_max'
> option.
>
> Not sure why the manual (page 85) says to 'reduce' the value if you get an
> error message.
Because that will make Exim use fewer file descriptors!
-----------------
[*] But of course I could be wrong. Some bugs live an awful long time
before they are killed. OTOH, our Exim daemons here run for weeks and
weeks - but this is on Solaris, not Linux. So anything is possible. I
guess you really do need to find out more information.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--__--__--
Message: 4
Date: Thu, 19 Apr 2001 16:51:47 +0530
From: Suresh Ramasubramanian <mallet@???>
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Subject: Re: [Exim] RBL
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j.linn [exim-users] <19/04/01 12:26 +0100>:
> It looks like the RBL DNS site names have changed although the old ones
> still work. Perhaps the RBL documentation should be changed to reflect
It was announced on exim-users list quite some time back. Ditto with
comp.mail.sendmail, news.admin.net-abuse.email and a bunch of other places.
The maps.vix.com zone is going away on April 31, I believe.
--
Suresh Ramasubramanian <--> mallet <at> efn <dot> org
EMail Sturmbannfuhrer, Lower Middle Class Unix Sysadmin
--__--__--
Message: 5
Date: Thu, 19 Apr 2001 12:39:59 +0100 (BST)
From: Philip Hazel <ph10@???>
To: "j.linn" <sys044@???>
cc: <exim-users@???>
Subject: Re: [Exim] RBL
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On Thu, 19 Apr 2001, j.linn wrote:
> It looks like the RBL DNS site names have changed although the old ones
> still work. Perhaps the RBL documentation should be changed to reflect
> this
>
> blackholes.mail-abuse.org
> relays.mail-abuse.org
> dialup.mail-abuse.org
Thanks, but I know about this and will change the documentation at the
next release. A message about this was also posted to this list
recently. The old ones will cease to work shortly, I believe.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--__--__--
Message: 6
Date: Thu, 19 Apr 2001 12:44:20 +0100 (BST)
From: "j.linn" <sys044@???>
To: Philip Hazel <ph10@???>
cc: exim-users@???
Subject: Re: [Exim] RBL
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Yes I saw it almost immediately after I sent the message.
John Linn
--__--__--
Message: 7
Date: Thu, 19 Apr 2001 12:54:24 +0100
From: Peter Galbavy <peter.galbavy@???>
To: John Horne <J.Horne@???>
Cc: exim-users@???
Subject: Re: [Exim] Exim 3.22 leaking file handles?
Message-ID: <20010419125418.A15945@???>
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On Thu, Apr 19, 2001 at 11:49:16AM +0100, John Horne wrote:
> Not sure why the manual (page 85) says to 'reduce' the value if you get an
> error message.
Because if you are running out of file descriptors, you want to force
exim to use less per process, so that the overall total is lower
across the installation...
--
Peter Galbavy
Knowledge Matters Ltd
http://www.knowledge.com/
--__--__--
Message: 8
Date: Thu, 19 Apr 2001 12:57:26 +0100
From: Malcolm Beattie <mbeattie@???>
To: Vladimir Ivaschenko <hazard@???>
Cc: "Jeremy C. Reed" <reed@???>, mAnu <mcardenas@???>,
exim-users@???
Subject: Re: [Exim] Exim vs sendmail vs PostFix vs Qmail
Message-ID: <20010419125726.D32059@???>
References: <Pine.LNX.4.21.0104161857140.452-100000@???> <Pine.BSO.4.21.0104181142130.19651-100000@???> <20010418220013.B31456@???>
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Vladimir Ivaschenko writes:
> Jeremy C. Reed wrote about "Re: [Exim] Exim vs sendmail vs PostFix vs Qmail":
>
> > On Wed, 18 Apr 2001, mAnu wrote:
> >
> > > > On Wed, Apr 11, 2001 at 01:59:18PM +0200, mAnu quothed:
> > > > > What are the main advantages and disadvantages of exim compared
> > > > > with others products?
> >
> > > I only need that it support over 1'5 or 2 million users, easy to
> > > configure and secure.
> >
> > If you plan on supporting that many users, then it is probably not a bad
> > idea to spend a few days installing, configuring and using sendmail, Exim,
> > postfix, and qmail to figure out which one seems to match your needs (and
> > experience). (Personally, I find exim easy to use and configure.)
>
> Or even better - install a test cluster. I doubt it is possible to support
> 1.5 mln users on a single node.
Based on a Linux/390 system I've been testing for the last 6 weeks or
so, back-of-the-envelope calculations lead me to believe you can
probably support between 300000 and 3 million users on a single z900
system.
--Malcolm
--
Malcolm Beattie <mbeattie@???>
Unix Systems Programmer
Oxford University Computing Services
--__--__--
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Date: Thu, 19 Apr 2001 13:03:40 +0100 (BST)
Organization: University of Plymouth
From: John Horne <J.Horne@???>
To: exim-users@???
Subject: Re: [Exim] Exim 3.22 leaking file handles?
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On 19-Apr-01 at 11:38:06 Philip Hazel wrote:
> On Thu, 19 Apr 2001, John Horne wrote:
>> On 19-Apr-01 at 10:32:26 Florian Laws wrote:
>> > One error message of exim itself:
>> > 2001-04-19 11:37:15 14qAsF-0000V4-01 exec of
>> > exim -Mc failed: Too many open files in system
>> >
>> Not sure why the manual (page 85) says to 'reduce' the value if you get
>> an error message.
>
> Because that will make Exim use fewer file descriptors!
>
Of course :-) I was reading it (the manual and the error message!) the wrong
way - "running out of file descriptors so 'increase' the number exim can
use". Not the same thing. Back to sleep for me I think...:-)
John.
------------------------------------------------------------------------
John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914
E-mail: jhorne@???
PGP key available from public key servers
--__--__--
Message: 10
To: Malcolm Beattie <mbeattie@???>
cc: Vladimir Ivaschenko <hazard@???>,
"Jeremy C. Reed" <reed@???>,
mAnu <mcardenas@???>, exim-users@???
Subject: Re: [Exim] Exim vs sendmail vs PostFix vs Qmail
From: Nigel Metheringham <Nigel.Metheringham@???>
In-Reply-To: Message from Malcolm Beattie <mbeattie@???>
of "Thu, 19 Apr 2001 12:57:26 BST." <20010419125726.D32059@???>
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mbeattie@??? said:
> Based on a Linux/390 system I've been testing for the last 6 weeks or
> so, back-of-the-envelope calculations lead me to believe you can
> probably support between 300000 and 3 million users on a single z900
> system.
Not your common or garden server....
My feeling is that the MTA is a relatively small (even insignificant)
part of the overall burden of doing large mail systems. Other
significant issues (off the top of my head) are:-
- back end mail storage
- back end retrieval
- spool (and back end) disk access (filesystem, raid etc)
- user dbs etc
- dns
Brad Knowles reckons he can do a million or so ISP customers on a
single bsd box under sendmail with modified (index cache) mbox storage
[NB from memory - I think that was in his verbal comments but canot see
that in his paper]
Nigel.
--
[ Nigel Metheringham Nigel.Metheringham@??? ]
[ Phone: +44 1423 850000 Fax +44 1423 858866 ]
[ - Comments in this message are my own and not ITO opinion/policy - ]
--__--__--
Message: 11
To: tom@???
Cc: exim-users@???
Organization: University of Surrey, Guildford, England
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Date: Thu, 19 Apr 2001 13:48:17 +0100
From: Graeme Wilford <g.wilford@???>
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Subject: [Exim] exiscan and delivery process explosion
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Tom,
We've been using exiscan-0.99 for a while now (since I last emailed you
to discuss a possible race condition) and have been very happy with it.
Recently, we had a series of power and system failures that left us with
exim queues containing several thousand successfully scanned emails.
When starting 'exim -bd -q' without exiscan under these conditions, a
max of queue_run_max queue runners (default: 5) are spawned. However,
when exiscan is used to handle de-queueing, it spawns an explicit exim
delivery process for each and every spooled email. Our mail servers
would boot and then run out of resources as 2000+ exim processes fought
to deliver outstanding emails.
Although individual exim daemons obey exim.conf limits, they don't keep
track of each other and the only global limit appears to be based on
system load (in our case, we ran out of VM before load got much above 1).
exim list: Anyone able to verify this?
Can exiscan be modified to fork delivery processes as children and use
wait to monitor and limit the maximum amount running at any one time?
I might be able to spend a little time looking at this if it doesn't
clash with other exiscan development and if you aren't already looking
into this...
Cheers,
Wilf.
--
Dr Graeme Wilford SCS and IT Manager for ECM
School of ECM Phone: +44 (0)1483 879125
University of Surrey Fax: +44 (0)1483 534139
Guildford, GU2 7XH email: G.Wilford@???
--__--__--
Message: 12
Date: 19 Apr 2001 13:03:06 -0000
Message-ID: <20010419130306.1419.qmail@???>
From: michael@???
To: exim-users@???
Subject: Re: [Exim] Exim vs sendmail vs PostFix vs Qmail
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> Brad Knowles reckons he can do a million or so ISP customers on a
> single bsd box under sendmail with modified (index cache) mbox storage
> [NB from memory - I think that was in his verbal comments but canot see
> that in his paper]
I have a few hundred thousand mailboxes per machine, using maildir.
Michael
--__--__--
Message: 13
Date: Thu, 19 Apr 2001 15:32:00 +0200
From: kuksi <kuksi@???>
To: exim-users@???
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Subject: [Exim] v3.15
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Where am I find an exim source with version 3.15?
I hacked something in this version, but I can't find..where are..my
lines..:-(..
--
kuksi
-----------------------------------
legalabbis...(gondolom en..:-)
email: kuksi@???
-----------------------------------
--__--__--
Message: 14
Date: Thu, 19 Apr 2001 14:58:07 +0100
From: Malcolm Beattie <mbeattie@???>
To: michael@???
Cc: exim-users@???
Subject: Re: [Exim] Exim vs sendmail vs PostFix vs Qmail
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michael@??? writes:
> > Brad Knowles reckons he can do a million or so ISP customers on a
> > single bsd box under sendmail with modified (index cache) mbox storage
> > [NB from memory - I think that was in his verbal comments but canot see
> > that in his paper]
>
> I have a few hundred thousand mailboxes per machine, using maildir.
When Brad gave his talk at the UKUUG Enterprise Management conference
in February, I noticed that the figures for "typical ISP mail usage"
were up to an order of magnitude lower than we have here. In other
words, he allowed a tenth of the disk space for the average user and
was seeing about a tenth of the connections that we see (mostly because
he was concentrating on POP, not IMAP). If one can handle one million
users each with 10MB disk usage (20MB or 50MB quota: i.e. 10TB of disk)
and with 100000 concurrent IMAP connections with IMAP logins at the rate
of 1000 per second (multiplying up from our figures here) on a single
BSD box then I'll be both surprised and impressed.
--Malcolm
--
Malcolm Beattie <mbeattie@???>
Unix Systems Programmer
Oxford University Computing Services
--__--__--
Message: 15
Date: Thu, 19 Apr 2001 15:07:24 +0100
From: Malcolm Beattie <mbeattie@???>
To: Nigel Metheringham <Nigel.Metheringham@???>
Cc: Vladimir Ivaschenko <hazard@???>,
"Jeremy C. Reed" <reed@???>,
mAnu <mcardenas@???>, exim-users@???
Subject: Re: [Exim] Exim vs sendmail vs PostFix vs Qmail
Message-ID: <20010419150724.F32059@???>
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Nigel Metheringham writes:
>
> mbeattie@??? said:
> > Based on a Linux/390 system I've been testing for the last 6 weeks or
> > so, back-of-the-envelope calculations lead me to believe you can
> > probably support between 300000 and 3 million users on a single z900
> > system.
>
> Not your common or garden server....
>
> My feeling is that the MTA is a relatively small (even insignificant)
> part of the overall burden of doing large mail systems. Other
> significant issues (off the top of my head) are:-
> - back end mail storage
> - back end retrieval
> - spool (and back end) disk access (filesystem, raid etc)
> - user dbs etc
> - dns
My figures included all the above. One server box connected to one
disk box.
--Malcolm
--
Malcolm Beattie <mbeattie@???>
Unix Systems Programmer
Oxford University Computing Services
--__--__--
Message: 16
Date: Thu, 19 Apr 2001 16:27:50 +0200
From: Tom Kistner <tom@???>
To: Graeme Wilford <g.wilford@???>
Cc: exim-users@???
Subject: Re: [Exim] exiscan and delivery process explosion
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On Thu, Apr 19, 2001 at 01:48:17PM +0100, Graeme Wilford (g.wilford@???) wrote:
> We've been using exiscan-0.99 for a while now (since I last emailed you
> to discuss a possible race condition) and have been very happy with it.
>
> Recently, we had a series of power and system failures that left us with
> exim queues containing several thousand successfully scanned emails.
>
> When starting 'exim -bd -q' without exiscan under these conditions, a
> max of queue_run_max queue runners (default: 5) are spawned. However,
> when exiscan is used to handle de-queueing, it spawns an explicit exim
> delivery process for each and every spooled email. Our mail servers
> would boot and then run out of resources as 2000+ exim processes fought
> to deliver outstanding emails.
I see. Thats a design error on my part. I do not check how many 'exim -Mc'
type processes are already running.
> Can exiscan be modified to fork delivery processes as children and use
> wait to monitor and limit the maximum amount running at any one time?
yes, exiscan could fork itself and the child would wait for the "exim -Mc"
system call to finish, while the parent could happily continue scanning.
The child could then quit and the parent would reap it with a
(non-blocking) waitpid call while running through the main loop the next
time ... Parent would hold a child counter and compare it against a MAX
setting in the config file ...
> I might be able to spend a little time looking at this if it doesn't
> clash with other exiscan development and if you aren't already looking
> into this...
It won't clash with the 1.0 exiscan series as I have begun work on a
much-improved rewrite, focusing on cleaner code instead of featurism
(the current features will be in, of course).
This issue will be fixed in the rewrite, however I would kindly ask if you
could fix it for 0.99 / 1.00 ? I would place it on my exiscan page as a
diff, with credits :) I'm swamped with real life (paid) work at the moment :)
cheers,
tom
--
Tom Kistner <tom@???> | ICQ 1501527
--__--__--
Message: 17
From: "Gordon McKee" <gordon@???>
To: "Exim Users" <exim-users@???>
Date: Thu, 19 Apr 2001 15:51:01 +0100
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Subject: [Exim] Rejecting EMail
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Hi
I currently have the following director set up to block mail:
forced_fail:
driver = aliasfile
senders = *@webfusion.co.uk
file = /usr/local/etc/exim/bouncelist
search_type = lsearch*
The bouncelist looks like this:
*: :fail: 550 You are not authorised to send mail to this recipient
How can I adapt this so I have a text file with an address on each line that
is either a full address of a domain name. For example:
demon@???
*@hotmail.com
*@yahoo.com
Gordon
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