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SMTP doesn't work on remote machine


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#1 Barrel

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Posted 19 August 2015 - 03:47 AM

I'm trying to setup TLS e-mail on remote machine, but it doesn't work.

Trying to send e-mail on my local machine (Windows 7 x64 locale ru-ru) and it works:

    16:33:18 CONNECT   : Looking up host name mail.domain.com...
    16:33:18 CONNECT   : Host name mail.domain.com found
    16:33:18 CONNECT   : Connecting to host mail.domain.com [123.456.789.123:25]...
    16:33:18 CONNECT   : Connected to host mail.domain.com [123.456.789.123:25]
    16:33:19 SMTP REPLY: 220 mail.domain.com ESMTP Postfix
    16:33:19 SMTP SEND : EHLO hostname
    16:33:19 SMTP REPLY: 250-mail.domain.com
    16:33:19 SMTP REPLY: 250-PIPELINING
    16:33:19 SMTP REPLY: 250-SIZE 73400320
    16:33:19 SMTP REPLY: 250-VRFY
    16:33:19 SMTP REPLY: 250-ETRN
    16:33:19 SMTP REPLY: 250-STARTTLS
    16:33:19 SMTP REPLY: 250-ENHANCEDSTATUSCODES
    16:33:19 SMTP REPLY: 250-8BITMIME
    16:33:19 SMTP REPLY: 250 DSN
    16:33:19 SMTP SEND : STARTTLS
    16:33:19 SMTP REPLY: 220 2.0.0 Ready to start TLS

All is correct.

Then, using the same email account, on remote machine, all settings are absolutely identical (Windows XP Home locale ru-ru):

    16:34:29 CONNECT   : Looking up host name mail.domain.com...
    16:34:29 CONNECT   : Host name mail.domain.com found
    16:34:29 CONNECT   : Connecting to host mail.domain.com [123.456.789.123:25]...
    16:34:30 CONNECT   : Connected to host mail.domain.com [123.456.789.123:25]
    16:34:30 SMTP REPLY: 220 ***************************
    16:34:30 SMTP SEND : EHLO hostname
    16:34:31 SMTP REPLY: 250-mail.domain.com
    16:34:31 SMTP REPLY: 250-PIPELINING
    16:34:31 SMTP REPLY: 250-SIZE 73400320
    16:34:31 SMTP REPLY: 250-VRFY
    16:34:31 SMTP REPLY: 250-ETRN
    16:34:31 SMTP REPLY: 250-XXXXXXXA
    16:34:31 SMTP REPLY: 250-ENHANCEDSTATUSCODES
    16:34:31 SMTP REPLY: 250-8BITMIME
    16:34:31 SMTP REPLY: 250 DSN
    16:34:31 SMTP SEND : QUIT
    16:34:32 SMTP REPLY: 221 2.0.0 Bye
    16:34:32 DISCONNECT: Disconnected from server

As you see, something substitutes mail commands.

P.S. Telnet gives the same results:

SMTP REPLY: 220 ***************************

Annotation:

1. All workstations work normaly with this smtp-server. Only this pc fails to send.

2. Scanning with antivirus gave no results

3. In disk C there are leftovers of Combofix (Quobox folder). But I can't remove it, access denied. Also I can't remove Combofix with "combofix /uninstall", command not found.

 

Any help would be appreciated.


Edited by Barrel, 19 August 2015 - 06:02 AM.


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#2 quietman7

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Posted 19 August 2015 - 05:00 AM

The correct way to uninstall ComboFix, all of its related folders, files and logs is to make sure it is still on the Desktop (<-Important!!!) and follow these instructions.
  • When finished you will see a dialog box stating that "ComboFix has been uninstalled".
  • After that, you can remove the ComboFix.exe program from your Desktop by right-clicking on it and choosing delete.
  • If you encounter any problems using the switch from the Run dialog box or Search field, just rename ComboFix.exe to Uninstall.exe, then double-click on it to remove.
If ComboFix is no longer on your Desktop, re-download it from here, save to the Desktop and follow the instructions above to properly uninstall it from your computer.

Another option if the above is unsuccessful is to download DelFix by Xplode and save to your Desktop.
  • Double-click on delfix.exe to run the tool.
    Vista/Windows 7/8 users right-click and select Run As Administrator.
  • Put a check mark next to these items:
    - Activate UAC
    - Remove disinfection tools
    - Create registry backup
    - Purge System Restore
    - Reset system settings
  • Click the "Run" button.
  • When the tool has finished, it will create and open a log report (DelFix.txt)
  • A copy of that report will be saved to the following location C:\DelFix.txt.
-- Doing this will remove many specialized tools downloaded and used for malware removal. Any leftover logs, files, folders or tools remaining on your Desktop which were not removed can be deleted manually (right-click on it and choose delete).
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#3 quietman7

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Posted 19 August 2015 - 05:26 AM

I am moving this topic to a more appropriate forum for your primary issue...SMTP doesn't work on remote machine.
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#4 Barrel

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Posted 19 August 2015 - 05:47 AM

to make sure it is still on the Desktop

 

 

Didn't understand. I need executable on my Destkop?

Well, I downloaded combofix.exe, copied it to desktop.

 

Ok, I launched it from desktop with key /uninstall

And it installs into that system!,But after that, command "combofix", still not found. What does it mean? Did it not install?

 

OK, I ran delfix.exe. It removed Quobox and executable from desktop.

But TLS SMTP still does not work, same issue remains.



#5 quietman7

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Posted 19 August 2015 - 05:59 AM

You originally posted in the Anti-Virus and Anti-Malware Software forum which was ok for issues with ComboFix and other specialized fix tools. I only assisted with providing instructions to remove ComboFix...my area of expertise.

...But TLS SMTP still does not work, same issue remains...

That's why I moved your topic to this forum where others can provide suggestions rather than just reply and advise you to start a new topic here.
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#6 Barrel

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Posted 19 August 2015 - 06:58 AM

Possible solution

http://www.cisco.com/c/en/us/support/docs/security/email-security-appliance/118550-qa-esa-00.html


Edited by Barrel, 19 August 2015 - 07:03 AM.





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