E-mail, chat, & VoIP forum: Outlook error 0x800CCC0F

If you read the solutions above, most are changing of the MTU setting or new router firmware.

I see that it's your first post. Please avail yourself of the solutions in this thread.

I too am experiencing the 'freezing' of Outlook Express and receiving the 0x800CCC0F error notice. But there is more to the problem: at the same time, all input from the internet to my computer also 'freezes'. I can watch my ISP status window 'Received' numbers and the input just stops. It doesn't matter what I'm doing in Internet Explorer, I will receive a error page 'cannot find server'. Nothing more comes in. BUT... if I wait about an hour online (I use dial-up) the problem 'unlocks' and internet data can again be received, including email via Outlook Express. There appears to be some devious timer at work here. Has anyone else experienced this problem outside of Outlook Express? Oh, one more detail; I can send out an email addressed back to myself and it will cycle through my ISP and come back to me, even though the rest of the internet access seems frozen. Huh??

I recently had the same problem. It is relatively easy to fix. All you need to do is direct your Outbound Emails through your ISP. For example: If you have sbc.global.net as you service provider then you need to use them as your SMTP path. Many ISP these days do this to protect their user community and themselves from SPAMMERS. They closely watch the volume, and kinds of traffic, going out their portals. When you configure your email account(s) you need to make sure that your ISP is your SMTP path. Doing this will not change your origination address in any way. For instance if you have your own website and you want your email to show as coming from your website, you can do that and still use your ISP SMTP portal for sending email. The SMTP path will only be the vehicle that delivers the mail, and that is what your ISP wants. Simply change your outbound email server to the SMTP server of your ISP. You will have to configure your login to that server to coincide with your ISP email address and password. It's a pain but it's only done once, and then you should have no more problems. As an example:

You have a website: www.yourcoolwebsite.com and you want emails sent to anybody to show that it came from you@yourcoolwebsite.com.

But you use SBC as a Internet Service Provider (ISP)

When you configure Outlook or whatever you use you will make your incoming Email: (mail/pop or whatever they tell you at your hosting service).yourcoolwebsite.com
ex: mail.yourcoolwebsite.com
For your outgoing Email you would use something like this: smtp.sbcglobal.yahoo.com and provide a login ID and password for the SBC account; normally your Email address.

If you are using the latest version of Outlook you can specify a reply address... here you can add yourcoolwebsite.com Email address just to be sure that's waht they see. But I'm quite sure it's not totally necessary.

Hope this helps.

RWR

i have ISA Server 2004 in The LAN ... I want Used The Microsoft Outlook 2003 For The Send And Receive By Outlook By the POP3 prtocol But request Me This Error ((( Task 'support - Sending' reported error (0x80004005) : 'The operation failed )))

Why did you bury your post in this long discussion?

Hey fellas,

i solved the problem.

Even though all the settings were correct, i had to go to Default SMTP Virtual Server - ACCESS - Authantication - USERS - and then, evem though there is Authanticated users group, i had to explicitly add users there who can access it.

Also, in the outlook i had to turn on SMTP authantication. No more errors, works great!

I have been having problems with this error for some time and have tried a number of solutions listed here. The most effective solution so far: I started permanently deleting (with shift+delete) all spam/junk email items immediately as soon as they arrive or I see them in the junk folder. This seems to have subtantially reduced the frequency of this error's occurence. Hope it helps.

http://www.outlook-tips.net/howto/delete_rr.htm

I don't have a new solution, but I identified something I was doing on my end that kept me from solving the problem. I read through a couple of hundred posts on CNET, including this whole thread, looking for an answer. One of the recommendations was to turn off the email scanning in NAV (I have corp ed 10). I assumed that disabling auto-protect in NAV would achieve the same goal as disabling email scanning, when in fact, turning off auto-protect does not affect email scanning. I spent hours trying other solutions, but to no avail. I went back into NAV finally and turned off email scanning the proper way, and viola! What do you know, all of my email started popping in. I wasted alot of time by trying to short cut the recommendations that were listed earlier.

The answer to this problem is maybe quite simple; many dsl providers requires that you use their servers to send e-mails.
Example; I use netfirms and had problems sending (not receiving). I changed smtp server (under accounts) from smtp.netfirms.com (<- just an example) to smtp.my-dsl-provider.com (<-also an example

Success!

I have often deleted my account and recreated it with success but this only works for a limited time before the problem reappears.

It has nothing to do with antivirus or spyware.

Turning off e-mail scanners etc. may work for a few days / month but then the problem reappears.

Give it a try...maybe this will work for you as well..

my wireless connection doesn't work probably,i had verizon dsl connection,can i change my compagny

Yesterday both my wife's computer and mine started getting the Ox800CCCOf error. Tried everything, even Comcast Live Online Chat. No help. Today called Comcast hand they had me change the SMPT server port from 25 to 587. Worked immediately. They said that port had been blocked for Spam. Thanks for telling me. I had spent hours troubleshooting.

Three years after your problems ended, mine began. Thanks for posting this port switch - worked like a charm.

I use Office XP and Outlook 2002 on a Windows XP computer. I started getting this error last week and have spent way too much time trying to fix it.

I could receive email but not send anything with Outlook. I tried Outlook Express and I could send and receive without a problem. Even my backup software could send an email notification that the backup was successful. I have read through many threads and tried many fixes to no avail. Today I was successful in sending email with Outlook.

One of the things I tried was to completely uninstall Microsoft Office XP and reinstall it, this did nothing. After reinstall Office XP I went to Microsofts web site to search for updates to Office XP. I installed SP3 for Office XP then went back and installed two updates for Outlook 2002. Currently my Outlook is sending and receiving email as before.

I dont know if updating Office and/or Outlook will fix all Outlook 0x800CCC0F errors, but it might be worth a shot. Certainly easier than a lot of the other suggestions which have worked for other users.

I will report back if the problem comes back.

All I did, per the Tech Service guy, was to sign out of att.yahoo.com and then sign back in. This somehow fixed the problem. Hope it works for you.