Account: 'POP.ATT.YAHOO.COM', Server: 'POP.ATT.YAHOO.COM', Protocol: POP3,
Server Response: '-ERR popgate unknown command', Port: 110, Secure(SSL): No,
Server Error: 0x800CCC90, Error Number: 0x800CCC18

Wrong port number and SSL setting. Use the settings specified by your provider:
http://www.att.com/esupport/article.jsp?sid=KB401738

Also, go to Tools, Accounts, select that mail account, Properties, Servers.
Make sure that "Log on using Secure Password Authentication" is not enabled.

Gary VanderMolen, Microsoft MVP (Mail)


"rcatonrealtor" wrote in message ...

Account: 'POP.ATT.YAHOO.COM', Server: 'POP.ATT.YAHOO.COM', Protocol: POP3,
Server Response: '-ERR popgate unknown command', Port: 110, Secure(SSL): No,
Server Error: 0x800CCC90, Error Number: 0x800CCC18

Running Outlook 2007 on Vista with AT&T DSL?.
I had this problem too and wanted to put in what worked for me. My problem was that I had two email accounts one from my 3rd party website and one from att.net. The 3rd party website sent and received email fine. My att.net account received email but would not SEND email. Further until about a month ago this problem was INTERMITTENT at best. Until one day it just stopped working period. The account stopped receiving and sending email. The entire time I received this error message:
Task 'Lydia Marcassa - Sending' reported error (0x800CCC0F) : 'The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).'
After tons of research and performing the following things:
1. Checking and rechecking the sets up for my email account. Doing a registry scan and clean (one site suggested a registry scan and clean would help)
2. Deleted and re-set up the att.net email account, 2x.
3. Ran a scan and clean of registry set up.
4. Ran a scan and clean for any possible viruses.
5. Logged on to my AT&T webmail account and verified that it was working properly. AT&T help line suggested that if this is NOT done then problems will result.
6. Exporting all my old email and deleting them (one site suggested that a strange email might cause this issue)
7. I uninstalled and disabled all web protection, virus scan software. ALL because several sites suggested that it was a problem between these programs and their set up affecting Outlook and AT&T.
8. I started it in safe mode after doing all this and nada.
9. I uninstalled and reinstalled Outlook 2007 and then reinstalled all updates from Microsoft.
10. I re-set up my accounts. Again my third party account continued to work and somewhere along the line my receiving began to work.
11. I stumbled upon an AT&T forum regarding this issue not only affecting Outlook but MacMail and Windows Live. AT&T spewed bs; however, the other members on the forum suggested three things:
?1 Unselected the ?My SMTP requires authorization and use my incoming settings.?
Did this and nada.
?2 That the problem might originate from not authenticating the YAHOO email. So I logged onto the YAHOO email and selected options and verified my email account.
Did this and nada.
?3 That the problem originates from the settings on the Advance tab. AT&T suggest that you set the Incoming Pop3 settings to 995 and outgoing to 465. I was suggested to change the outgoing setting to 587. I did and?.
I began to send email and stopped receiving it! (yes, seriously)
SOOOO ? I changed the incoming pop3 account setting to 110, the default and?
Now everything works. Who knows the mind of AT&T? Certainly not me or the days I wasted trying to make this work.
To be clear: I set my Incoming Server (Pop3) to 110 and my Outgoing Server (SMTP) to 587 all on the advance tab setting in Outlook under account settings for the AT&T account.
Just wanted my solution out there.


On Monday, August 02, 2010 6:11 PM rcatonrealtor wrote:

Account: 'POP.ATT.YAHOO.COM', Server: 'POP.ATT.YAHOO.COM', Protocol: POP3,
Server Response: '-ERR popgate unknown command', Port: 110, Secure(SSL): No,
Server Error: 0x800CCC90, Error Number: 0x800CCC18


On Tuesday, August 03, 2010 1:42 AM Gary VanderMolen wrote:

Wrong port number and SSL setting. Use the settings specified by your provider:
http://www.att.com/esupport/article.jsp?sid=KB401738

Also, go to Tools, Accounts, select that mail account, Properties, Servers.
Make sure that "Log on using Secure Password Authentication" is not enabled.

Gary VanderMolen, Microsoft MVP (Mail)



Account: 'POP.ATT.YAHOO.COM', Server: 'POP.ATT.YAHOO.COM', Protocol: POP3,
Server Response: '-ERR popgate unknown command', Port: 110, Secure(SSL): No,
Server Error: 0x800CCC90, Error Number: 0x800CCC18


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