-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Keith Johnson
Sent: Thursday,
January 06, 2005 7:30 AM
To: [email protected]
Subject: RE: [IMail Forum] Nobody
vs Rejects
John,
We have the
exchange2aliases where we can, however, we also have Domino Servers that we
connect to that do not support LDAP (older versions).
Keith
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of John Tolmachoff (Lists)
Sent: Thursday,
January 06, 2005 10:23 AM
To: [email protected]
Subject: RE: [IMail Forum] Nobody
vs Rejects
Ding Ding Ding Ding Ding Ding
You have gatewayed domains.
Gateway to what kind of server.
You are most likely seeing dictionary
type spam attacks to the gateway domains, in which Imail is indeed accepting
all and then having to deal with the non-deliverable when it attempts to send
it to the gatewayed server.
So yes, it makes perfect sense that the
spool is backing up, as your server is being flooded. You need to use
exchange2aliases.
John Tolmachoff
Engineer/Consultant/Owner
eServices For You
-----Original Message-----
From: Keith Johnson
[mailto:[EMAIL PROTECTED] On
Behalf Of Keith Johnson
Sent: Thursday, January
06, 2005 5:14 AM
To: [email protected]
Subject: RE: [IMail Forum] Nobody
vs Rejects
As always, I
appreciate your comments. I agree with you it doesn't seem right that the
queue should grow with a ton of env. rejections. I thought SMTPD handled
the rejections. The CPU on both seem to be fine, as in, good peaks and
valleys, never above 50%. I was on there at 4am this morning and noticed a backlog had happened around 3am. Thus over 3000 items
in queue, most of which was spam of course. We use Imail Registry
database and no errors are being reported in the log. We have poured
through the log and are in the process of getting per hour numbers during this
time frame to see where connections are coming from. This box hosts both
virtuals and gateway clients. It is just doesn't make sense that Queue
Mgr stalls (always shows STARTED as a service, with no event log errors nor
errors in the queue). Could it be that a high level of spam connections
could overload queue manager with the understanding that the cpu never goes
over 50%? I am wondering if there is an issue with the actually Imail
exe's. Thanks again for the aid and time.
-----Original
Message-----
From:
[EMAIL PROTECTED] on behalf of Sanford Whiteman
Sent: Thu 1/6/2005 12:40 AM
To: Keith Johnson
Cc:
Subject: Re: [IMail Forum] Nobody
vs Rejects
>
Recently we instituted a policy to
not allow nobody aliases,
> however, now I have noticed that our Queue will grow out of control.
Well, that's backwards.
> What I have noticed is a since the nobody alias is gone, there are a
> large amount of 'invalid user' rejects
happening.
That's expected, no?
> This server produces between 75K and 100K
messages per day.
"Produces" as in relays? Delivers locally? Both combined?
> Would it be better to NULL the nobody alias and actually black hole
> the email vs. having the 'invalid users' rejected?
If a reasoned comparison shows that going back to 'nobody' stops
the
hangs, then it would be, strictly
speaking, "better" for your
particular case. But there's no way that the technical theory
behind
envelope-level rejection is inferior to spool-and-delete. There
may,
it seems, be something in the implementation and/or your envt which is
causing a cascading issue.
> Just wondering about the Queue Mgr getting overwhelmed with refusal
> connections could be causing this issue.
QUEUEMGR doesn't handle incoming SMTP connections--that's SMTPD. If QM
is hanging, the problem is definitely not _directly_
linked to the
envelope rejections.
Other questions:
- How's SMTP's and QM's CPU?
- What userbase are you using?
- Are there any errors in the SMTPD logs?
--Sandy
------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]
SpamAssassin plugs into Declude!
http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release/
Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases!
http://www.mailmage.com/products/software/freeutils/exchange2aliases/download/release/
http://www.mailmage.com/products/software/freeutils/ldap2aliases/download/release/
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html
List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
