Question about Outlook Express

We have personalised email addresses - say address A in my case - which I have registered. Emails to these addresses were forwarded to the actual addresses at @btinternet.com, I had set up WLM so that sent messages showed them originating from eg address A. We have now had to change and have @outlook.com and @gmail.com addresses but have failed to set up WLM to show the messages originating from eg address A. Help please!

OS is Win 7 Home Premium 64 bit.

Thanks

Yesterday I tried to add another windows live mail account to my desk top.  It will not get past the synchronizing stage (still)  I did all the repairs as suggested.  Now my windows live mail contact list has reverted to a very very old list.  How can I get back my latest list???  And fix the new account issue too

[Original title: windows live mail]

everything I turn off my computer and turn it back on the videos on my timeline become corrupted even though they were working fine before. It does not give me the option to "find" them, it just asks me to delete them. I have tried everything including converting the videos, and relinking the videos when it gives me the option to do so.

What can I do to make it so my videos don't get corrupted?

I am using windows 10