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Forums > General Discussion Forums > ArGoSoft Mail Server .NET Edition
Login Attacks and CBL
Last Post 05 May 2010 03:56 AM by Robert. 5 Replies.
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KenGUser is Offline
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Posts:12

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21 Apr 2010 06:33 AM  

My server has been blacklisted by CBL 3-4 time over the last 4 months. I use AVG on teh server itself, and ClamAV on the e-mail. I run Spyware tools, and have found the machine and all network machines clean.

CBL keeps saying it is a virus or BOT. I can't find it.

I have checked Event Viewer and over the last time period have noticed that we have been getting blasted by login attempts periodicly. Event Viewer reports unauthorized login attempts to AgroSoft by an IP address. There may be 150-200 attempted logins from a single IP address. The next time the IP address will be different, but another round of 100+ attempts. Is this normal?  Is something getting through? If I don't fix this issue, CBL has threatened to permanently block my IP. Any direction is greatly appreciated. If this occurs, I will be forced to use an external server for e-mail.

RobertUser is Offline
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26 Apr 2010 03:48 AM  
Have you looked at the host name?

CBL blacklisted me a few years ago after a server rebuild. After trying various things I kept getting blacklisted. I emailed CBL explaining everything I'd done. They emailed back with a few pointers that get servers blacklisted. After checking the first couple I found I hadn't set the host name of the mailserver.

HTH
KenGUser is Offline
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26 Apr 2010 02:33 PM  
Where do you set the host name? Do you use your domain name, the machine IP address???
Steve TopilnyckyUser is Offline
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27 Apr 2010 08:26 AM  
You can set the host name in the Server Options -> Local Host. I would use your domain name that can be resolved externally. For example, I use topcatcomputing.com for my local host, so it will always resolve back to my IP address.
- - - - - - -
Regards,
Steve Topilnycky
Top Cat Computing
http://www.topcatcomputing.com/
KenGUser is Offline
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04 May 2010 09:45 AM  
Thanks RA56XX and Steve. This appears to have fixed the blacklisting troubles!
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05 May 2010 03:56 AM  
Glad to help
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News from ArGoSoftMinimize
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

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