473,703 Members | 2,898 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Help! Sending Emails From asp.net Application

I am currently developing a C# asp.net application where users are
required to register. The application then generates a simple, plain
text email and sends it to the new user.

I have been trying to use the MailMessage and SmtpMail classes from the
System.Web.Mail namespace (built in to .net) to do this. It is my
understanding that these classes use CDONTS (cdosys.dll) and the SMTP
mail service on the server to send the messages. Messages are generated
and then placed in the "Queued" folder under the SMTPRoot folder in
IIS. The SMTP server service does the rest...

The problem I am having is that this method appears to be extremely
unreliable, at best. Sometimes the message will send, and sometimes I
get a "could not access CDO.Message" exception/error. After searching
for this on usenet, I have also discovered that this problem appears to
be very common. The only solution I can find is to reboot the
service/server (and that doesn't always work!)

Anyways, this is clearly not going to work in a production environment,
so I need to do something about it.

I would like to know if anyone has any suggestions on what I might do
to improve performance and reliability when trying to send emails from
my asp.net application. Are there better options to use for this (i.e.
3rd party components or tools?) If so, what would you recommend, and
why?

Thanks in advance for your help!

Nov 19 '05 #1
2 1457
Joey wrote:
The problem I am having is that this method appears to be extremely
unreliable, at best. Sometimes the message will send, and sometimes I
get a "could not access CDO.Message" exception/error. After searching
for this on usenet, I have also discovered that this problem appears to
be very common. The only solution I can find is to reboot the
service/server (and that doesn't always work!)

Anyways, this is clearly not going to work in a production environment,
so I need to do something about it.

I would like to know if anyone has any suggestions on what I might do
to improve performance and reliability when trying to send emails from
my asp.net application. Are there better options to use for this (i.e.
3rd party components or tools?) If so, what would you recommend, and
why?

Thanks in advance for your help!


I've heard good things about aspNetEmail (haven't tried it myself though):

http://www.aspnetemail.com/

Good luck,
Ben
Nov 19 '05 #2
Hi, Joey.

The biggest problem I've seen when using an smtp server to send emails
is that the connection limit is easily surpassed because the system can
create emails faster than they can be sent out.

That causes a bit of unreliability and choking.

I've seen good results, and almost perfect reliability, when a little
delay is introduced to allow the number of connections to be lowered.

This little piece of code might be of help ::

if( connectionLimit != -1
&& ++sentCount >= connectionLimit ) {

System.Threadin g.Thread.Sleep( new TimeSpan( 0, 0, 0, 15, 0 ) );

sentCount = 0;
}

re:
It is my understanding that these classes use CDONTS (cdosys.dll)
and the SMTP mail service on the server to send the messages.
Windows Server 2003 does not install Collaboration Data Objects (CDO)
for NTS (CDONTS). Therefore, applications that use CDONTS do not
function on a Windows Server 2003-based computer.

Actually, the System.Web.Mail namespace provides a managed wrapper
for CDOSYS. The System.Web.Mail namespace is only available in
..NET Framework applications.

re:
"could not access CDO.Message"

What is your OS ?


Juan T. Llibre
ASP.NET MVP
http://asp.net.do/foros/
Foros de ASP.NET en Español
Ven, y hablemos de ASP.NET...
=============== =======

"Joey" <jo*********@to pscene.com> wrote in message
news:11******** **************@ g43g2000cwa.goo glegroups.com.. .I am currently developing a C# asp.net application where users are
required to register. The application then generates a simple, plain
text email and sends it to the new user.

I have been trying to use the MailMessage and SmtpMail classes from the
System.Web.Mail namespace (built in to .net) to do this. It is my
understanding that these classes use CDONTS (cdosys.dll) and the SMTP
mail service on the server to send the messages. Messages are generated
and then placed in the "Queued" folder under the SMTPRoot folder in
IIS. The SMTP server service does the rest...

The problem I am having is that this method appears to be extremely
unreliable, at best. Sometimes the message will send, and sometimes I
get a "could not access CDO.Message" exception/error. After searching
for this on usenet, I have also discovered that this problem appears to
be very common. The only solution I can find is to reboot the
service/server (and that doesn't always work!)

Anyways, this is clearly not going to work in a production environment,
so I need to do something about it.

I would like to know if anyone has any suggestions on what I might do
to improve performance and reliability when trying to send emails from
my asp.net application. Are there better options to use for this (i.e.
3rd party components or tools?) If so, what would you recommend, and
why?

Thanks in advance for your help!

Nov 19 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

21
6549
by: Dave | last post by:
After following Microsofts admonition to reformat my system before doing a final compilation of my app I got many warnings/errors upon compiling an rtf file created in word. I used the Help Workshop program: hcw.exe that's included with Visual Basic. This exact same file compiled perfectly with no notes, warnings or errors prior to reformatting my system. Prior to the reformatting, I copied the help.rtf file onto a CD and checked the box to...
4
3351
by: Sarir Khamsi | last post by:
Is there a way to get help the way you get it from the Python interpreter (eg, 'help(dir)' gives help on the 'dir' command) in the module cmd.Cmd? I know how to add commands and help text to cmd.Cmd but I would also like to get the man-page-like help for classes and functions. Does anyone know how to do that? Thanks. Sarir
6
4339
by: wukexin | last post by:
Help me, good men. I find mang books that introduce bit "mang header files",they talk too bit,in fact it is my too fool, I don't learn it, I have do a test program, but I have no correct doing result in any way. Who can help me, I thank you very very much. list.cpp(main program) //-------------------------------------------------------------------------- - #pragma hdrstop #pragma argsused
6
3018
by: d.warnermurray | last post by:
I am doing a project for school that involves creating help files for a html authoring tool. If you could help me with answers to some questions it would really help. 1. What tasks do you expect an html authoring tool to help you accomplish? 2. What do you expect from online help for a html authoring tool? 3. What audience do you think a freeware html authoring tool is directed towards?
3
3359
by: Colin J. Williams | last post by:
Python advertises some basic service: C:\Python24>python Python 2.4.1 (#65, Mar 30 2005, 09:13:57) on win32 Type "help", "copyright", "credits" or "license" for more information. >>> With numarray, help gives unhelpful responses:
2
3941
by: BT Openworld | last post by:
I have just had to upgrade to Access 2003 as Access 97 EMail (SendObject) doesn't work when loaded on Windows XP. I'm finding my way around Access 2003 but my biggest problem is getting information. When I bought Access 1.0 many years ago, I got a paper manual and an excellent help file with all you needed to know. With Access 97 the manual came as a 'Building Applications' document on the CD and I still had the excellent help. With Access...
5
3268
by: Steve | last post by:
I have written a help file (chm) for a DLL and referenced it using Help.ShowHelp My expectation is that a developer using my DLL would be able to access this help file during his development time using "F1" help within the VB IDE. Is this expectation achievable In trying to test my help file in the IDE, I have a solution with 2 projects: the DLL and a tester. VB does not look for my help file; instead, it looks for path to my source code...
8
3227
by: Mark | last post by:
I have loaded Visual Studio .net on my home computer and my laptop, but my home computer has an abbreviated help screen not 2% of the help on my laptop. All the settings look the same on both including search the internet for help, but the help is worthless. Any ideas?
10
3362
by: JonathanOrlev | last post by:
Hello everybody, I wrote this comment in another message of mine, but decided to post it again as a standalone message. I think that Microsoft's Office 2003 help system is horrible, probably the worst I ever seen. I almost cannot find anything I need, including things I
1
6129
by: trunxnirvana007 | last post by:
'UPGRADE_WARNING: Array has a new behavior. Click for more: 'ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?keyword="9B7D5ADD-D8FE-4819-A36C-6DEDAF088CC7"' 'UPGRADE_WARNING: Couldn't resolve default property of object Label. Click for more: 'ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?keyword="6A50421D-15FE-4896-8A1B-2EC21E9037B2"' Label = New Object(){Box1, Box2, Box3, Box4, Box5, Box6, Box7, Box8, Box9, Box10, Box11,...
0
8749
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9243
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
9002
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8956
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
7853
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5922
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4420
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
2
2434
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2057
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.