Outlook 2010 setup

[Sundog]

I have set up Outlook 2010 on my home-office computer for the first time, with help from my ISP, CableOne. My intent is to use Outlook for emails to/from a new email account, something@something.com. I've sent a test message from Outlook to my Webmail account, else@else.com.

When I look at the Sent message in Outlook, the sender shows as from something@something.com. When I view the message via Webmail at else@else.com, the exact same message now shows the sender as different@different.com. What should I do to get the message as coming from something.com in both places?

Edited to add screenshots from Outlook and Webmail.
Edited to disguise the email addresses in body.
Edited to remove screenshots.

[HansV]

Select File, click Info, then click Account Settings | Account Settings...
Select your account and click Change...

Do you see ...@redinc.com there or ...@cableone.net?
If the former, I'd contact CableOne about it.
If the latter, change it to your @redinc.com address, then click Test Account Settings... to see if it still works.

BTW, I would remove the full e-mail addresses from your first post, to prevent spam robots from harvesting them. The two screenshots don't matter, the robots won't read those (but they do give your full e-mail addresses away to all humans reading your post).

[Sundog]

Thanks for your editing tips.

Changed Outgoing Mail Server from @cableone.net to @redinc; incoming already had @redinc.

Tried many possible combinations of More Settings>Outgoing Server and Advanced tabs.

Finally succeeded with:

Outgoing Server>My outgoing server (SMTP) requires authentication=Unchecked, and

Advanced>Incoming server (POP3)=110,
Advanced>Use Defaults=Unchecked
Advanced>This server requires an encrypted connection (SSL)=Unchecked
Advanced>Outgoing server (SMTP)=587
Advanced>Use the following type of encrypted connection=None
Advanced>Server Timeouts=1 minute