In the SMTP security there is a check box that refers to autodeny hack
attempts. This will limit the number of concurrent connections to the SMTP
service. The person sending you a lot of e-mail that you blocked is
probably tying up the SMTP resources so it will stop accepting connections
until it deals with its current limit. Unchecked the hack attempts box may
solve your problem by eliminating the concurrent connection limit.
A member supported Anti-Spam Database for Postfix, Sendmail, and IMail.
Postfix RPMs for RedHat 7.1 available in the member's section.
http://www.postfixgate.com
----- Original Message -----
From: "Rob A" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, July 30, 2001 2:22 AM
Subject: [IMail Forum] smtp auth fails
> Hi everyone,
>
> system spec: NT 4.0 sp6/imail 5.09/PIII 800 MHZ/512 MB RAM
>
> I've been running this version for IMail for over year now without this
> problem occuring until a couple days ago. I have SMTP AUTH set (using
relay
> for addresses). Every few minutes, IMail stops accepting any
> authentications for SMTP. If i stop and restart the SMTP service, it
works
> fine for another few minutes. Looking in the logs, I noticed a large
amount
> of emails from a particular address, so I blocked their IP. This address
no
> longer shows up in my log, but I'm still experiencing the SMTP problem. I
> read something about version 6.0 being susceptible to a DoS attack. Does
> this also affect 5.09? Also, what should I be looking for in the logs to
> troubleshoot this problem?
> When this problem occurs the SMTP service shows in IMonitor to be up and
> running, but no SMTP AUTHs can be done. Any ideas are appreciated
>
> thanks,
> Rob
>
>
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