Solved

Exchange Bandwidth Issue

Posted on 2006-10-24
3
157 Views
Last Modified: 2010-03-19
Okay, here's the situation - Win2003SP1 AD domain with Exch03SP2. We have a DMZ with ISA04 as the "back" firewall with Exchange sitting behind it. We also have a web server sitting in the DMZ tied to a DB server behind the ISA server. Last night a user sent 1100 messages that were 1MB in size and the entire network choked. We have folks working an event who needed access back into the webserver/database and were basically locked out until I turned off the SMTP service on the Exchange server (I'd used Network Monitor to see that the traffic was originating from Exchange). I turned the service back on in the middle of the night to attempt to clear the queue while no one would be needing network access (which seemed to work).

Here's the problem: it's going to continue happening. These email blasts (not spam, this is to members who've asked for it!) happen a couple times a week now. I can't have these blasts choking the network.

Looking at Task Manager, Networking on both the ISA and Exchange boxes, they claimed about .18% of the bandwidth of the NIC was being utilized. I know that isn't the most accurate tool in the world, but still...

What can I do to make better use of the bandwidth I've got? And are 1100 1MB messages unreasonable? Our infrastructure is 100 megabit between the Exchange server and the ISA server. Is there a "buffer" modification I can make to ISA or Exchange?

This probably isn't a hard question but it is important to me. Thanks much.
0
Comment
Question by:USFS
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 104

Accepted Solution

by:
Sembee earned 125 total points
ID: 17826154
Exchange isn't very good at working with this type of email blast. If it is going to be a regular thing then I would look at purchasing an application that can manage the email distribution for you. Something like Lyris immediately springs to mind, but there are others that are probably cheaper. A dedicated application will manage the email flow to conserve bandwidth, and will deal with the bounces that you will get.

Simon.
0

Featured Post

Free NetCrunch network monitor licenses!

Only on Experts-Exchange: Sign-up for a free-trial and we'll send you your permanent license!

Here is what you get: 30 Nodes | Unlimited Sensors | No Time Restrictions | Absolutely FREE!

Act now. This offer ends July 14, 2017.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

#Citrix #Citrix Netscaler #HTTP Compression #Load Balance
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question