5.5.2 Syntax error. 74sm17603206qgf.32 - gsmtp           error code 17099

I receive this error msg when sending an email.   Please help me with cause and solution.

Thanks

After thinking I had installed windows essentials (but cant find it) windows live mail icon disappeared and got an error msg that said my corrupt calendar was corrupted and would not allow windows live mail to open. Have not found a way to fix it. Whats up
This is the error msg , i have been receiving since afternoon, 
also my account is not accessible on my mobile phone and also online hotmail website too. 
please hekp urgently. thanks

Unable to send or receive messages for the Live (***********) account.

Server Error: 503
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x801941F7

 

Can't log in on web, either.

 

Any ideas?

When I startup OUTLOOK I get the "Page Cannot be Displayed" error msg.  It gives this msg because the web address it is looking for is

SN128W.SNT128.mail.live.com and that doesn't exist. All it needs is mail.live.com which does exist.  How do I correct the WEB Address?

When I startup OUTLOOK I get the "Page Cannot be Displayed" error msg.  It gives this msg because the web address it is looking for is

SN128W.SNT128.mail.live.com and that doesn't exist. All it needs is mail.live.com which does exist.  How do I correct the WEB Address?

Although the official "status" page says "running normally" - I can't sign in at hotmail.com and if it procedes at all, am getting the error msg "There's a problem signing in,  Hotmail wasn't able to sign in to your account at this time. Please try again later."  Very frustrating.  

PLEASE HELP! I've looked this issue up online for the past couple of days and cant find a solution :( 
Can anyone tell me why I can not send out emails and keep getting this error message?
Thank you in advanced, Mag
I am trying to sign up live mail for the following domain:
NZBASSOCIATES.COM

This is not for spamming purposes, and is for a legitimate business site. I got this error message as soon as i tried signing up:

"This domain name can't be used because it contains a protected word or inappropriate language. Please contact support if you feel this is not the case."

Could you please advise regarding the same. This is my first experience with live mail for domains.

thanks in advance!
krayker