I am currently having a reoccurring issue with my Windows Live Email address.  Every so often when I try to send my mail, I get something like this and I will not be able to receive or send mail:  

----

An unknown error has occurred.

Subject 'Censored'
Server Error: 421
Server Response: 421 Cannot connect to SMTP server 63.231.195.31 (63.231.195.31:587), connect error 10060
Server: 'pop.dnvr.qwest.net'
Windows Live Mail Error ID: 0x800CCC67
Protocol: SMTP
Port: 587
Secure(SSL): No

Unable to send or receive messages for the Qwest (censored) account. Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity.

Server: 'pop.dnvr.qwest.net'
Windows Live Mail Error ID: 0x800CCC0F
Protocol: POP3
Port: 993
Secure(SSL): Yes

----

I have used the information from this site to change my sever ports and the like, but still now dice.  This is incredibly frustrating; I am almost 90 years old and no one has been able to explain to me properly why my email address keeps doing this.  How do I fix this?  And how do I prevent this from happening again?