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palanka
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Posted: 19 January 2009 at 7:57am \| IP Logged

how do i capture notification that a new message has arrived?

i am running against a gmail account if that makes any difference.

my small application must monitor a gmail account 24x7 and pick up any new message as soon as it arrives. i have the imap demo2 application running successfully against a gmail account already (many thanks for the demo!)

any suggestions?

thanks,
tim

Igor
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Posted: 19 January 2009 at 8:45am \| IP Logged

This can be achieved using IDLE mode provided by appropriate mail server extension.

You can download a sample application here. It enters IDLE mode, and when there's a new message on IMAP server, the application stops idling, downloads the message and restarts the idling process.

The package includes complete source code and the executable file. You can use this code for developing your application.

Regards,
Igor

palanka
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Posted: 20 January 2009 at 7:23am \| IP Logged

Thanks Igor, your examples have been extremely helpful!

Tim

palanka
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Posted: 20 January 2009 at 7:45am \| IP Logged

Hi Igor, I seem to have an issue with gmail on the example, see log file. My firewall is off. I got the same result for port 993 and the default port.

any ideas?

[09:33:22.30] [INFO] Assembly version: 4.0.2.105.
[09:33:22.28] [INFO] Will resolve host "imap.gmail.com".
[09:33:22.39] [INFO] Host "imap.gmail.com" resolved to IP address(es) 209.85.133.111, 209.85.133.109.
[09:33:22.39] [INFO] Will connect to host "imap.gmail.com" on port 993.
[09:33:22.52] [INFO] Error: SocketException occurred. InnerException message follows: An attempt was made to access a socket in a way forbidden by its access permissions 209.85.133.111:993

Andrew
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Posted: 21 January 2009 at 4:19am \| IP Logged

The sample we provided you with doesn't have SSL support, but Gmail requires SSL connections. So, you should just enable SSL.

If enabling SSL (it's important to use SslStartupMode.OnConnect mode) doesn't help, please capture new log file and provide us for examination.

Best regards,
Andrew

palanka
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Posted: 21 January 2009 at 9:21am \| IP Logged

OK i got sslstartupmode set, but still same error:

imp = new Imap();
imp.SslMode = SslStartupMode.OnConnect;

imp.Log.Filename = @"log.txt";
imp.Log.Enabled = true;
imp.Log.Clear();

imp.Connect(textBoxServer.Text, 993);

log file:

[11:15:44.22] [INFO] Assembly version: 4.0.2.105.
[11:15:44.19] [INFO] Will resolve host "imap.gmail.com".
[11:15:45.42] [INFO] Host "imap.gmail.com" resolved to IP address(es) 209.85.133.109, 209.85.133.111.
[11:15:45.44] [INFO] Will connect to host "imap.gmail.com" on port 993.
[11:15:46.80] [INFO] Error: SocketException occurred. InnerException message follows: An attempt was made to access a socket in a way forbidden by its access permissions 209.85.133.109:993

Thanks again for your help,
Tim

Igor
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Posted: 22 January 2009 at 2:53am \| IP Logged

The code itself is fine, but it seems your system experiences concurrent connections limit. Please refer to this article, it contains detailed information on the issue and instructions how to overcome it.

Regards,
Igor

palanka
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Posted: 22 January 2009 at 7:37am \| IP Logged

Igor, i don't think my system is in the state described in the article, see results below.

Its interesting that your imapdemo2 solution connects to gmail perfectly. I studied the differences and the only thing that i see is that imapdemo2 connects using asynchronous BeginConnect/EndConnect and the idle demo using synchronous Connect. any possibility that is the issue?

tim

Proto Local Address          ; Foreign Address        State         & nbsp; PID
TCP    127.0.0.1:668   &n bsp;      127.0.0.1:49194 ;       ESTABLISHED     2932
TCP    127.0.0.1:27015         127.0.0.1:49160        ESTABLISHED     2860
TCP    127.0.0.1:49160         127.0.0.1:27015        ESTABLISHED     2340
TCP    127.0.0.1:49194         127.0.0.1:668         ;  ESTABLISHED     2252
TCP    127.0.0.1:58864         127.0.0.1:58865        ESTABLISHED     5320
TCP    127.0.0.1:58865         127.0.0.1:58864        ESTABLISHED     5320
TCP    127.0.0.1:58866         127.0.0.1:58867        ESTABLISHED     5320
TCP    127.0.0.1:58867         127.0.0.1:58866        ESTABLISHED     5320
TCP    192.168.0.117:59075  &n bsp; 74.201.74.24:12975     ES TABLISHED     2532
TCP    192.168.0.117:59174  &n bsp; 192.168.0.133:3389     ES TABLISHED     4664
TCP    192.168.0.117:59337  &n bsp; 72.246.98.91:80       ; TIME_WAIT       0

palanka
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Posted: 24 January 2009 at 3:59pm \| IP Logged

I tried my own suggestion - using BeginConnect/EndConnect instead of just Connect - and it did not work.

Why does IMAPDemo2 connect successfully to imap.gmail.com, but the IDLE Sample program does not?

tim

Alex
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Posted: 26 January 2009 at 8:14am \| IP Logged

Try IMAP Demo 1, it also uses Connect instead of BeginConnect.

Regards,
Alex

palanka
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Posted: 26 January 2009 at 8:48am \| IP Logged

Thanks Alex, i tried that, but had the same outcome:

IMAP Demo1 does not connect
IMAP Demo2 does connect
IDLE Sample does not connect

My firewall is off. I assume all 3 programs operate correctly on your equipment.

have you any other suggestions?

thanks guys,
tim

Alex
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Posted: 29 January 2009 at 6:51am \| IP Logged

Weird. What happens if you do an opposite thing - modify IMAP Demo 2 and replace BeginConnect with Connect? Is the connection result the same?

Of course, login stage would not run in this case as the callback function won't be called but maybe the connection itself will complete successfully?

Regards,
Alex

JonGetty
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Posted: 08 October 2009 at 10:46am \| IP Logged

Just Tried IMAP Demo 1 with Alex's example above and this time it worked well. Thanks for this useful thread.

ailaonzo
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Posted: 17 October 2009 at 9:11am \| IP Logged

thanks for this. this really helped me

jerryboone
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Posted: 27 October 2009 at 12:04am \| IP Logged

i tried what alex said. it worked for me!

christineb1979
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Posted: 27 December 2010 at 8:08pm \| IP Logged

Can anyone give instruction about this?

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christineb1979
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Posted: 27 December 2010 at 8:09pm \| IP Logged

Any help will much appreciated.

Igor
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Posted: 28 December 2010 at 12:38am \| IP Logged

christineb1979: what exactly you need help with?

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Regards,
Igor, AfterLogic Support

bookofradeluxe
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Posted: 10 October 2011 at 4:14am \| IP Logged

Can anyone give instruction about this?

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Igor
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Posted: 10 October 2011 at 4:15am \| IP Logged

About what exactly, bookofradeluxe?

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Igor, AfterLogic Support

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