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slies
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Posted: 17 July 2006 at 5:37pm | IP Logged Quote slies
Howdy,

We are attempting to use the mailbee object to replace the use of the CDONTS objects that the .NET Mail objects use internally.

We have started with just the SMTP Demo App for C# and trying to get it to send.

I set it up as our public SMTP server, smtp.corporatesvcs.net and I get the following message "Socket Connection has timed out. InnerException message follows: A connection attempt failed because the connected party did no properly respond after a period of time, or established connection failed because connected host has failed to respond"

This SMTP is active and actively being used via the standard .Net Mail objects by simplying stating the smtp server and are on in constant operation. I also logged in via telnet and verified it is working.

Any help at what to look at would be appreciated.

- Scott
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Alex
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Posted: 18 July 2006 at 7:47am | IP Logged Quote Alex
We tried to connect to smtp.corporatesvcs.net on port 25 but found the connection can't be established.

To let us investigate the problem in more detail, could you please provide us with the following details:
- mail server address (if it is not smtp.corporatesvcs.net);
- port number;
- login/password of a test account on your mail server. Please make sure this problem persist on this test account.

Please send this information to support@afterlogic.com.


Best regards,
Alex
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sas
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Posted: 26 December 2006 at 3:07pm | IP Logged Quote sas
Hello,

I do have the same problem. It not only occurs when using my code but also the sample 1 for SMTP.NET. I traced the network traffic and I'm posting it here. If you need more info please contact me:

--- start
220 smtp.server (mrelayeu4) Welcome to Nemesis ESMTP server
EHLO domain
250-mrelayeu4 pleased to meet you
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-PIPELINING
250-SIZE 52428800
250 HELP
AUTH LOGIN
334 VXNlcm5hbWU6
bTgwNDI3MjQtdGVzdA==
334 UGFzc3dvcmQ6
dGVzdDEyMzQ1Ng==
235 authentication finished successfully
RCPT TO:<email>
503 bad sequence of commands
--- end

After that it runs on the timeout.

Sascha
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Andrew
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Posted: 27 December 2006 at 8:05am | IP Logged Quote Andrew
Perhaps, your SMTP server just advertises pipelining support, but actually doesn't support it. In pipelining mode, MailBee.NET SMTP component sends several commands to the SMTP server simultaneously and if your server doesn't support pipelining (just advertises it), it may skip MAIL FROM (should be sent prior to RCPT TO) command. You can try to disable pipelining as follows (C# syntax):

Code:
Smtp.LicenseKey = "Trial or permanent key";
Smtp mailer = new Smtp();

// Specify SMTP server and enable authentication. Remove last 2 parameters if SMTP
// authentication is not required in order to send mail through your SMTP server.
mailer.SmtpServers.Add("mail.domain.com", "jdoe", "secret");

// Disable pipelining
mailer.SmtpServers[0].Pipelining = false;

// Set sender
mailer.From.DisplayName = "John Doe";
mailer.From.Email = "jdoe@domain.com";

// Demonstrate various methods to specify recipients.
mailer.To.AsString = "email@address.com";

mailer.Subject = "Test";
mailer.BodyPlainText = "Test";

mailer.Send();



If it doesn't help, could you please provide us with a test account on your mail server on which the issue can be reproduced? You can send this info to support@afterlogic.com.


Best regards,
Andrew
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sas
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Posted: 29 December 2006 at 5:45am | IP Logged Quote sas
Disabling Pipelining helped. But: the server actually supports it. I found out that when disabling the anti virus services (which act as a proxy for all mail traffic) the code runs perfect. Thanks for your help. BTW: I disabled pipelining, living w/o an anti virus is maybe not the best idea ;)

Kind regards,
Sascha
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Alex
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Posted: 29 December 2006 at 8:05am | IP Logged Quote Alex
Thanks for posting back. Now it's clear there is a bug in your antivirus. It intercepts SMTP traffic from pipelining-enabled SMTP server and then transmits it to other apps but does not support pipelining itself. In this case, it should exclude pipelining from the list of advertized capabilities but it "forgets" to do so.

Regards,
Alex
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