Multiple copies being sent + smtp 451 - ArGoStuff - Forums - General Discussion Forums

	Register Login
	February 10, 2012

SearchWebSite

You are here: Forums

Home
ArGoStuff
       About
       ArGoStuff Supporters
       Forum Posting Policy
Forums
Articles
       Articles Archive
Cyber Security Tips
FAQ
Downloads
Links

Top 10 Links

Well Known Port Numbers	3064

Can Spam Act Information	2318

Cobri Computer Services	2040

Port Detective	1983

DotNetNuke (DNN)	1833

SPF Set Up Wizard	1811

Test Virus Sender	1797

Network Abuse Clearinghouse Mail Relay Ttesting	1782

DNNDEV	937

ZTree	746

ArGoStuff User to User Support Forums

Unanswered Active Topics

Forums Search

Forums > General Discussion Forums > ArGoSoft Mail Server .NET Edition

Multiple copies being sent + smtp 451

Last Post 07 Dec 2008 11:47 AM by Steve Topilnycky. 7 Replies.

Sort:

	Prev Next
You are not authorized to post a reply.

Author

Messages

gyroscopes User is Offline

New Member

Posts:20

01 Dec 2008 05:02 PM
I've got a problem with the mail server. It has been occuring in the last few versions ( at least ) of the .net mail server. On rare occasions multiple copies of the of a message will be sent. Basically a mail client uses smtp to talk to the mail server. The server accepts the mail until something happens towards the end of the communication. The mail server states "Error: Error reading the string" in the log. And the client lists a 451 or even a 452. The interesting thing is that the mail server sends the e-mail but the client (correctly) things the mail was never sent and hence keeps trying to send. Make sense? So this gives me two questions Why is the mail server producing "Error: Error reading the string" And why is it giving a 451 or 452 response but still sending the mail. Any suggestions?

gyroscopes User is Offline

New Member

Posts:20

01 Dec 2008 07:00 PM
here is the details from the mail server log [SMTP 004618 01-12-08 18:25:26] Received SMTP Connection from 193.110.88.156 [SMTP 004618 01-12-08 18:25:26] 220-mail.brightfusion.co.uk ArGoSoft Mail Server SMTP Module v.1.0.5.8 at Mon, 01 Dec 2008 18:25:26 GMT [SMTP 004618 01-12-08 18:25:26] 220 Welcome to the Brightfusion mail server. no spam please. [SMTP 004618 01-12-08 18:25:26] Trusted IP or host [SMTP 004618 01-12-08 18:25:26] EHLO gyro [SMTP 004618 01-12-08 18:25:26] 250-Welcome 193.110.88.156, nice to meet you... [SMTP 004618 01-12-08 18:25:26] 250-AUTH=LOGIN [SMTP 004618 01-12-08 18:25:26] 250-AUTH LOGIN [SMTP 004618 01-12-08 18:25:26] 250-SIZE 20971520 [SMTP 004618 01-12-08 18:25:26] 250-ETRN [SMTP 004618 01-12-08 18:25:26] 250 HELP [SMTP 004618 01-12-08 18:25:26] MAIL FROM: [SMTP 004618 01-12-08 18:25:26] 250 Sender "orders@gyroscope.com" OK... [SMTP 004618 01-12-08 18:25:26] RCPT TO: [SMTP 004618 01-12-08 18:25:26] 250 Recipient "test@msn.com" OK... [SMTP 004618 01-12-08 18:25:26] DATA [SMTP 004618 01-12-08 18:25:26] 354 Enter mail, end with "." on a line by itself [SMTP 004618 01-12-08 18:26:29] Appended to delivery queue with id 28936 [SMTP 004618 01-12-08 18:26:29] 250 Message accepted for delivery [SMTP 004618 01-12-08 18:26:29] SMTP Connection with 193.110.88.156 ended [SMTP 004618 01-12-08 18:26:29] Error: Error reading the string

gyroscopes User is Offline

New Member

Posts:20

03 Dec 2008 06:23 PM
Quick update. I've turned filtering off (after looking throught the forum) and this has NOT fixed the problem.

Steve Topilnycky User is Offline

Forum Administrator

Veteran Member

Posts:1278
Avatar

05 Dec 2008 01:09 PM
The log you posted does not show any duplicate messages being processed. After the SMTP session there should be a DLVR section that shows the actual communication between your server and the recipient server.

- - - - - - - Regards, Steve Topilnycky Top Cat Computing http://www.topcatcomputing.com/

gyroscopes User is Offline

New Member

Posts:20

05 Dec 2008 01:54 PM
Thats just one SMTP session. There are many SMTP sessions. One for every e-mail sent.

Steve Topilnycky User is Offline

Forum Administrator

Veteran Member

Posts:1278
Avatar

05 Dec 2008 03:14 PM
What I was getting at is that the segment of the log posted, only shows the SMTP part of the transaction, there should be a corresponding DLVR (or LDLV -Local Delivery) segment in the log. If it was being twice, it should be logging it. As to the Error: Error Reading String. I asked Archie about this. His response is below: Basically, it is old connection reset by peer error... The server expects to receive QUIT command, but receives disconnect instead. The client which delivers mail does not behave "nicely", that's all.

- - - - - - - Regards, Steve Topilnycky Top Cat Computing http://www.topcatcomputing.com/

gyroscopes User is Offline

New Member

Posts:20

07 Dec 2008 10:11 AM
Hi Steve, I contacted Archie. Basically its the SMTP client (Persits ASPemail) is fault not Argosoft Mailserver. For what ever reason the client is breaking away or not responding. It logs a 451 or 452 response in the clients log file. However Argosoft mailserver is not providing a 451 or 452. I thought it was and not listing in the logs. And yes archie said "Error: Error Reading String." is basically what most logs would call a "connection reset" or "connection broken". Interestingly Archie seems to know about the Persits ASPemail from previous problems. I've been using it with the Pro and .net versions but only just noticed it the past month. Time to remove Persits aspemail I think !

Steve Topilnycky User is Offline

Forum Administrator

Veteran Member

Posts:1278
Avatar

07 Dec 2008 11:47 AM
Why not contact Persits and let them know of the issue and get an updated component that does not behave in this way?

- - - - - - - Regards, Steve Topilnycky Top Cat Computing http://www.topcatcomputing.com/

You are not authorized to post a reply.

Forums > General Discussion Forums > ArGoSoft Mail Server .NET Edition

Active Forums 4.2

Donations

Find our site useful? Make a donation to show your support

ArGoStuff Supporters

News from ArGoSoft

1 2 3 4 5 6

Mail Server v1.0.8.3

Added support of STARTTLS (STLS) command for SMTP, POP3, IMAP, and SMTP relay and delivery, which will allow secure, fully encrypted connections, when possible;

11/6/2011 1:10:34 PM

Mail Server v1.0.8.2

Optimized delivery speed. In earlier versions each "tick" which was checking whether messages were in the outbox queue, was picking up only one message at a time. Now it will attempt to pick MaximumAllowedThreads-ActiveDelivery threads messages, which should considerably increase deliver speed;
Optimized SEARCH and STATUS IMAP commands. They appear to be used very extensively by Android, and (not that extensively, but still) by iPhone. Now users who use mobile phones to access their IMAP accounts will see considerable improvement;
Optimized STORE IMAP command. Before storing of IMAP flags was occuring one message at a time, which seemed to be fine with SQL server, but proved to be slow for SQLite... Now it happens with single SQL call.

10/8/2011 7:59:35 PM

ArGoSoft Mail Server v1.0.8.1

Fixed a bug: when using IMAP via Firefox with "When I delete a message, move it to Trash folder" option, marking messages in the trash folder was causing high CPU usage, and was taking some time, making the server pretty much non-responsive. The problem was happening only when using SQLite.

6/6/2011 9:33:36 PM

ArGoSoft Mail Server v1.0.8.0

Fixed a problem with web interface - was showing only first page of messages, and would not switch to other pages; In order to fix the web interface, mail server itself has to be updated;
When installint initially, was still using SQLite, even when SQL was requested;
There was a problem with switching from SQLite database engine to SQL server database engine: the SQL database was not being created;

5/23/2011 5:53:55 PM

ArGoSoft Mail Server .NET v1.0.7.9

The server no longer requires Microsoft SQL Server. If SQL server is not found, it will use SQLite engine, which does not require separate installation. If SQL server is found, then user will be prompted whether he wants to use it;
Made other improvements, such as, now mailbox rebuild indexes orphaned records, rather then deleting them, also added an opotion to increment UIDL validity of folder (both on the Mailbox viewer box);
Made minor improvements on web interface;

4/26/2011 9:47:25 PM

1 2 3 4 5 6

Protect Your Computer today with

Home:ArGoStuff:Forums:Articles:Cyber Security Tips:FAQ:Downloads:Links
Copyright 2006-2011 by ArGoStuff Terms Of Use Privacy Statement