Re: Some emails bounced when sent to Exchange 5.5

From: Susan VanAllen [MVP] (svanallen_at_nospam-mvps.org)
Date: 05/07/04 

Date: Fri, 7 May 2004 14:55:58 -0400

Sounds to me like you're getting slammed by spam - it's hogging your server
resources and your bandwidth. You need to look into some sort of spam
solution. This was posted earlier today, perhaps it would help you:

>
> Jason Nelson [MSFT] <Jason@online.microsoft.com>:
> "... for 5.5 you'll need to call PSS for a
> fix - KB 837794, which adds the ability to bit bucket NDRs in the 5.5
IMC."
>

Best of luck! 

-- 
hth,
SusanV
"Karthik" <joshkarthik@yahoo.com> wrote in message
news:7da2736b.0405071008.37556294@posting.google.com...
> Susan,
> Thanks for your prompt response.
> Forgot to mention that I did increased it to 50 and right now I have
> it as 100.
> As I mentioned these bounces are random.
> When I use perf monitor to see the connections inbound used it hovers
> from 40-70 occasionally reaching 100.
> My outbound messages per hr is steady at 300 and inbound messages at
> 100.
> I have a whole lot NDR's in my outbound queue like about 10000 ..would
> that be an issue??
> The machine is not a relay
> Even though I could send and receive emails (bit slow and some emails
> stay in outbound queue longer), when I test email using dnsstuff.com,
> I still get the error Could not connect: Could not receive data:
> Operation timed out.(Inbound connections in server <> 100 while i do
> this)
>
> Any idea of what's going on??
>
> Regards,
> Karthik
>
> "Susan VanAllen [MVP]" <svanallen@nospam-mvps.org> wrote in message
news:<#xjqgMENEHA.620@TK2MSFTNGP10.phx.gbl>...
> > So long as mail is still coming in you can adjust the maximum number of
> > inbound connections the IMS will accept by going to the properties of
the
> > IMS, Connections tab, and in the Transfer Mode area click on Advanced.
The
> > default inbound is 30, try increasing this to, say, 40. Restart the IMS
and
> > see if the problem still exists. If it still happens, but less
frequently,
> > increase again.
> >
> > -- 
> > hth,
> > SusanV
> >
> >
> > "Karthik" <joshkarthik@yahoo.com> wrote in message
> > news:7da2736b.0405070633.1caff50d@posting.google.com...
> > > Hello,
> > > We use Exchange 5.5 with SP4 Some mails are randomly bounce back and
> > > sender gets a message
> > > DATA
> > >
> > > <<< 421 XYZ.com connection limit reached
> > >
> > > Final-Recipient: RFC822;
> > >
> > > Action: delayed
> > >
> > > Status: 4.5.0
> > >
> > > Diagnostic-Code: SMTP;
> > >
> > > Last-Attempt-Date: Tue, 4 May 2004 02:00:51 -0700 (PDT)
> > >
> > > Will-Retry-Until: Fri, 7 May 2004 19:02:37 -0700 (PDT)
> > >
> > > When I test for mail in dnsstuff.com, I get the following error:
> > >
> > > [Could not connect: Could not receive data: Operation timed out.]
> > >
> > > But right now I could send and receive mails with no problem but with
> > > some delay. No events in log also.
> > >
> > > Somebody pleas help..
> > >
> > > Regards,
> > > Karthik

Relevant Pages

  • RE: OMA and Outgoing Spam
    ... Someone hacked a user account and use it to spam emails; ... Your Exchange server is open relaying emails;(You have checked it ... Your server is under RNDR Attack. ... When you enable recipient filtering on the SMTP virtual server, ...
    (microsoft.public.windows.server.sbs)
  • RE: OMA and Outgoing Spam
    ... Someone hacked a user account and use it to spam emails; ... Your Exchange server is open relaying emails;(You have checked it ... Your server is under RNDR Attack. ... Microsoft is providing this information as a convenience to you. ...
    (microsoft.public.windows.server.sbs)
  • Re: Exchange Weird Issue
    ... Emails are from different external users, ... involved in a conversation with the intended recipient. ... So I don't think it's a spam or open relay issue... ... Your server is open relaying emails. ...
    (microsoft.public.windows.server.sbs)
  • Re: smtpsvc 402
    ... Since some spam botnets intentionally use the secondary MX record to try to bypass various spam filters, it causes the DynDNS servers "call ahead" feature to connect and verify. ... Having that list on their server prevents that call-ahead, so only legit messages are forwarded in the first place. ... those connections from them were staying open... ... I have Symantec Mail Security for Exchange for Antivirus and I'm using ...
    (microsoft.public.windows.server.sbs)
  • Re: Need some help with spam / Virus
    ... My ISP is using spam filtering Mostly black lists that are published. ... my email is sent to a general mail box that resides on their server. ... Exchange 2003 does not have the ability to pull pop3 accounts to the ... What is bothering me is I am not sure if the emails that I am getting are ...
    (microsoft.public.exchange.admin)
Quantcast