09. February 2020 · Write a comment · Categories: Uncategorized


I use Windows Live Mail to receive, send, and file my business email. I have four email accounts through my business's web site. As such the address for all four email accounts uses the format (email)@(mybusinessdomain).com. When I am in the home office, where I use Optimum for my internet connection, my outgoing server name is mail.optonline.net. My incoming server is pop.hosting.earthlink.net.

I have been on the road visiting family, and so far I have been able to modify the outgoing mail server name to those specified by each cable internet provider used by the family/friend with whom I've been staying, and I have been largely successful in sending, as well as receiving my business emails. Because my web host, Earthlink downloads to my PC my emails upon request, I have not had to change that in order to successfully receive emails. Changing the outgoing server has, so far, enabled me to send emails as well.

The family with whom I am currently visiting uses Comcast, and I changed the outgoing mail server to that which I discovered on the web--smtp.comcast.net. As recommended, I set up the outgoing server port to either 587 or 465+SSL=yes. With both settings I received an immediate error message. That message was...

The message could not be sent because the server rejected the sender's email address. The sender's email address was *** Email address is removed for privacy ***'.

Subject 'test'
Server Error: 550
Server Response: 550 5.1.0 Authentication required
Server: 'smtp.comcast.net'
Windows Live Mail Error ID: 0x800CCC78
Protocol: SMTP
Port: 587
Secure(SSL): No

I then tried changing the server name to  mail.comcast.net (trying it first with the port 587, then 465+SSL=yes). Each time this caused a long delay in sending an email, with an eventual error message. That message was...

The connection to the server has failed.

Subject 'test'
Server: 'mail.comcast.net'
Windows Live Mail Error ID: 0x800CCC0E
Protocol: SMTP
Port: 587
Secure(SSL): No
Socket Error: 10060

My web hosting company, Earthlink, may be able to shed some light on this, and I have called them, but they are closed today, as it is Sunday.

I need to be able to communicate with my clients while I am away.

Is there something I have overlooked in setting this up?

Thank you,


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