Fix Your server has unexpectedly terminated the connection error 0x800CCC0F

This guide will show you How to Fix Your server has unexpectedly terminated the connection error 0x800CCC0F.  When you attempt to send or receive email, you see one of the following error messages.

RECOMMENDED: Fix this issue in 3 simple steps. Takes only 2 minutes.
1) Download repair utility.
2) Install program and click Scan button.
3) Click Fix Errors button when scan is completed.
4) Restart your computer.

  • Task ‘server name – Sending and Receiving’ reported error (0x800ccc0f): ‘The connection to the server was interrupted. If this problem continues, contact the server administrator or Internet service provider (ISP). The server responded: ? K’.
  • “Your server has unexpectedly terminated the connection. Error Number: 0x800CCC0F”

This issue may occur if one of the following scenarios is true:

  • Your Outlook might be disconnected or not connected to Internet.
  • Incorrect configuration of Antivirus or Firewall software
  • Incorrect settings of Outlook mail account.
  • When your Outlook user profile is damaged.
  • If Outlook email item on your POP3 server is damaged.
  • When Outlook is removed or installation of Outlook is damaged.

Warning : Before making any changes in your computer, I suggest you to create a System Restore point  so that you can restore back your computer to previous working stat if something goes wrong.

Fix Your server has unexpectedly terminated the connection error 0x800CCC0F

Warning : Before making any changes in your computer, I suggest you to create a System Restore point  so that you can restore back your computer to previous working stat if something goes wrong. Highly recommended to perform below resolutions steps by Professional Certified Experts, as it may corrupt your computer if you make any mistake.

Step 1: Make sure that you are connected to the Internet and able to telnet pop port number.

assets folding start collapsed To do this, follow these steps:

  1. Start an Internet browser. For example, start Internet Explorer. Or ping the google.com; ping www.google.com
  2. Type one of the following addresses in the address bar, and then press Enter.
  3. Check for the proxy settings as well.

Step 2: Make sure that your Outlook email account settings are correct.

Quick Info: Go through the below link to check email account settings in outlook

We have listed some major Internet Service Providers settings (for manual configuration of Outlook).

We recommend that you contact your Internet service provider (ISP) for information about the exact incoming and outgoing mail server names and settings that you should use when you configure your Internet email account in Outlook. The list provided here contains information only for some Internet service providers in the United States and may not be up to date.

Incoming Mail (POP3) server names and settings:

Provider Name Server Name Port SPA SSL AuthRequird
AOL pop.aol 110 OFF OFF ON
AT&T Yahoo pop.att.yahoo.com 995 OFF ON ON
Charter pop.charter.net 110 OFF OFF ON
Comcast mail.comcast.net 995 OFF ON ON
Cox pop.[insert region].cox.net 110 OFF OFF OFF
Gmail pop.gmail.com 995 OFF ON ON
Juno pop.juno.com 110 OFF OFF OFF
Microsoft Live pop3.live.com 995 OFF ON ON
Netscape pop.3.isp.netscape.com 110 OFF OFF ON
Netzero pop.netzero.com 110 OFF OFF ON
Pacbell pop.att.yahoo.com 995 OFF ON ON
PeoplePC pop.peoplepc.com 110 OFF OFF ON
Qwest pop.[enter state ID].qwest.net 110 OFF OFF OFF
Rogers pop.broadband.rogers.com 110 OFF OFF ON
SBCGlobal pop.att.yahoo.com 995 OFF ON ON
Swbell pop.att.yahoo.com 995 OFF ON ON
Verizon incoming.verizon.net 110 OFF OFF ON
Yahoo pop.mail.yahoo.com 110 OFF OFF OFF

Outgoing Mail (SMTP) server names and settings:

Provider Name Server Name Port SPA AuthRequired Encryption
AOL smtp.aol.com 587 OFF ON None
AT&T Yahoo smtp.att.yahoo.com 465 OFF ON SSL
Charter smtp.charter.net 25 OFF ON None
Comcast smtp.comcast.net 587 OFF ON TLS
Cox smtp.[insert region].cox.net 25 OFF OFF None
Gmail smtp.gmail.com 587 OFF ON TLS
Juno authsmtp.juno.com 587 OFF OFF None
Microsoft Live smtp.live.com 587 OFF ON TLS
Netscape smtp.isp.netscape.com 25 OFF OFF None
Netzero authsmtp.netzero.com 25 OFF ON None
Pacbell smtp.att.yahoo.com 465 OFF ON SSL
PeoplePC smtpauth.peoplepc.com 587 OFF ON None
Qwest pop.[enter state ID].qwest.net 25 OFF OFF None
Rogers smtp.broadband.rogers.com 587 OFF ON None
SBCGlobal smtp.att.yahoo.com 465 OFF ON SSL
Swbell smtp.att.yahoo.com 465 OFF ON SSL
Verizon outgoing.verizon.net 25 OFF ON None
Yahoo smtp.mail.yahoo.com 25 OFF OFF None

Step 3: Check your antivirus manufacturer’s website for additional suggestions or Disable the antivirus software. And Disable the firewall in router.

If you found outlook is working fine after disable the antivirus software, highly recommended to uninstall the same using their removal tool and reinstall it.

Uninstallers (removal tools) for common Windows antivirus software

List of manual antivirus uninstallers

    1. Click the link associated with the antivirus software currently installed on your system and follow the prompts or instructions on the website.
    2. Once uninstallation is complete, you will need to restart your computer.
Avast http://www.avast.com/uninstall-utility
AVG http://www.avg.com/us-en/utilities
Avira http://www.avira.com/en/support-for-free-knowledgebase-detail/kbid/88
BitDefender http://kb.bitdefender.com/site/article/333/
BullGuard http://www.bullguard.com/support/product-guides/bullguard-internet-security-guides-12/getting-started/uninstalling-bullguard.aspx
CA Antivirus see Total Defense Anti-Virus
Comodo Internet Security https://support.comodo.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=298
CounterSpy http://www.google.com/#q=counterspy+uninstall
Cyber Defender Early Detection Center http://www.ustechsupport.com/faq.html#q4
Dr. Web https://support.drweb.com/support_wizard/?lng=en
(Only registered Dr. Web users can access support content)
eScan http://www.microworldsystems.com/download/tools/esremove.exe
ESET http://kb.eset.com/esetkb/index?page=content&id=SOLN2788
FRISK F-PROT Antivirus for Windows http://www.f-prot.com/support/windows/fpwin_faq/25.html
F-Secure ftp://ftp.f-secure.com/support/tools/uitool/UninstallationTool.zip
http://community.f-secure.com/t5/Security-for-PC/How-do-I-uninstall-the-product/ta-p/15384
G Data https://www.gdatasoftware.co.uk/?eID=PushFile&dl=f4b2f2fd23%3AAFEIBgU%3D
Kaspersky http://support.kaspersky.com/common/service.aspx?el=1464
K7 Total Security http://www.k7computing.com/en/tools/K7RT.exe
LavaSoft http://www.lavasoftsupport.com/index.php?showtopic=28
Malwarebytes http://www.malwarebytes.org/mbam-clean.exe
McAfee http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe
Microsoft Security Essentials http://support.microsoft.com/kb/2435760
Norman Virus Control/Norman Security Suite http://www.norman.com/support/support_issue_archive/67798/en
Norton (Symantec) ftp://ftp.symantec.com/public/english_us_canada/removal_tools/Norton_Removal_Tool.exe
Norton Security Scan ftp://ftp.symantec.com/public/english_us_canada/removal_tools/NSSRT.exe
Panda http://www.pandasecurity.com/resources/sop/UNINSTALLER_08.exe
Panda Cloud Internet Protection http://www.pandasecurity.com/resources/sop/Cloud_AV_Uninstaller.exe
Pareto Logic http://www.paretologic.com/resources/help/xoftspyse/195.htm
Sophos http://www.sophos.com/support/knowledgebase/article/11019.html
Spybot Search & Destroy http://www.safer-networking.org/faq/how-to-uninstall-2/
Total Defense Anti-Virus (formerly CA Anti-Virus)  http://totaldefense.iyogi.com/?p=368
Trend Micro http://esupport.trendmicro.com/solution/en-us/1056551.aspx
Trend Micro Titanium http://esupport.trendmicro.com/solution/en-us/1059018.aspx
Trend Micro Worry-Free Business Security Agent http://esupport.trendmicro.com/solution/en-us/1057237.aspx
Vipre (Sunbelt Software) http://kb.threattracksecurity.com/articles/SkyNet_Article/How-to-Uninstall-VIPRE-Antivirus-and-VIPRE-Internet-Security
Webroot http://www.webroot.com/prodCheck/?pc=64150&origrc=1&oc=221&mjv=7&mnv=0&rel=6&bld=38&lang=en&loc=AUS&kc=ppc%60lkik^^afhgpewgfa&opi=2&omj=6&omn=1&osl=en&errid
Windows Defender http://kb.eset.com/esetkb/index?page=content&id=SOLN2390
Windows Live OneCare http://download.microsoft.com/download/4/c/b/4cb845e7-1076-437b-852a-7842a8ab13c8/OneCareCleanUp.exe
Windows Security Essentials http://support.microsoft.com/kb/2435760
Zone Alarm http://download.zonealarm.com/bin/free/support/download/clean.exe

 Step 3:  Create a new E-mail profile.

Conclusion:

If above steps did not help you to resolve the issues, you may have to create new outlook profile and reconfigure email settings, try creating new Windows user account as well. Hope this will help you to fix the issues. Or you have to contact your ISP for further assistance. For further support, leave comments or ask more on Forum.

Arun Prabhakar has written 159 articles

Arun Prabhakar immensely interested in following Windows and other technology developments. Being passionate Windows blogger, he loves to help others on fixing their computer issues.