I'm having the same problems and don't know what to do so would like some help too. I've just installed a new pc and have windows 8.1 which I am not getting on well with and don't like the email system as worked very slow  so downloaded windows live mail 2012 and really like the setup of this as similar to what I am used to when I had windows vista. I have set up all my email accounts (8 in total sky and yahoo mail) and I receive emails with no problem but unable to send any emails and get the below message

The message could not be sent because the server rejected the sender's email address. The sender's email address was ********** (deleted my email address)'.

Subject 'Swimming Lessons'
Server Error: 530
Server Response: 530 5.7.1 Authentication required
Server: 'smtp.tools.sky.com'
Windows Live Mail Error ID: 0x800CCC78
Protocol: SMTP
Port: 465
Secure(SSL): Yes

Please can you help resolve this problem and is windows live mail 2012 the best email client to use with this view.

Regards and looking forward to your reply

Two identical questions merged and the duplicate post deleted 

Hi,

im using Outlook 2011 for Mac and an Exchange-Server 2007.
Everything works fine but after one or two hours i cant send emails: unknown error -17890 .

i have to start the mac new that it works again.

Any Ideas?

For security reasons, this email account has been temporarily deactivated. A picture containing letters and numbers will appear when you close this window. To reactivate your account, enter the characters you see in the picture.

Subject 'The Best Path - YouTube'
Server Error: 3207
Windows Live Mail Error ID: 0x8DE00006

hI I HAVE BEEN UNABLE TO SEND EMAILS ON MY IPHONE TRIED SECONDARY PASSOWRD, NOTHIGNIS WORKING.
HAVE TRIED TO REINSTALL EMAIL ACCOUNT ALSO

PLEASE HELP

VIVEK
I have a business domain, and we are unable to send emails to Hotmail accounts. We can send to other domains like yahoo, or gmail, just not Hotmail. Help?
cant send emails from hotmail account
I am not having problems receiving but cannot the majority of my emails stay in my outbox from my Yahoo mail account.  I receive an error message: connection to server failed or dropped.  This only happens with Yahoo mail and at times it will go thru.  I have Mac 2011.  Please help

Original title: cant send emails but can receive.

 

Cant send emails but can receive.  When trying to send get error message 


Task  - Sending' reported error (0x800CCC69) : '  The server responded: 550 please see http://www.spamhaus.org/query/bl?ip=86.12.128.100'

I have been advised and had info on dns flush to force pc to get new ip address. I ve reset router, but still no joy.  Any help would be gratefully appreciated