Question about Outlook Express

I am using Thunderbird Mail on my windows 10 pc. For years I have had not problems with my mail. Now when I try to send mail with stationary the background for may mail I get this message. 

An error occurred while sending mail.

The mail server responded:  <*** Email address is removed for privacy ***> message rejected. Refer to Error Codes section at https://www.cox.com/residential/support/email-error-codes.html for more information. AUP#CXSNDR. Please check the message and try again.

I contacted Cox and they stated that for what ever reason the 3rd party mail servers such as Windows Live Mail 2011 & Thunderbird are not communicating properly with Cox. They said the problem is on the 3rd party mail server side.

I also use to create my backgrounds in my Windows Live Mail 2011 on my windows 7 through my Windows live mail, adding stationary and music, I also had the ability to go thru Internet Explorer (which I understand is not longer supported) which was still operable to send pages direct thru Windows Live Mail and has also been stopped for what ever reason. I prefer Windows Live mail to Thunderbird but on windows 10 I am not able to use my Windows Live Mail 2011 with the same capabilities.

Is there some settings that can be adjusted to allow me to continue with the capabilites I recently had to again create my stationary/music pages to send thru Windows Live Mail or even maybe thru Windows Outlook Mail? See the error message I get when I try to send mail from Internet Explorer thru my Windows Live Mail account.

An unknown error has occured.

Subject 'Sweet Peace'

Server error: 550

Server Response: 550 <*** Email address is removed for privacy ***> message rejected. Refer to Error Codes section at https://www.cox.com/resedential/support/email-error-codes,html for more information. AUP#CXSNDR

Server. 'smtp.cox.net'

Windows Live Mail Error ID0x800CCC69

Protocol: SMTP

Port 465

Secure(SSL): Yes

Burned a dvd after using movie maker. First saved movie as DVD with sound, using 128 kbps, 48 kHz, stereo.  Believe these are the settings I used in the past, unless a recent microsoft update changed them.  Movie is saved as wmv and I burned it as I have in the past, using my written instructions.  We have been able to play these dvds on our player hooked up to the TV.  This time we got a message saying audio format not supported.  

Should I change the audio format?

I have heard Windows does not offer Movie Maker in Win 10. However, I also hear

there are ways to download it. Can someone provide a safe workable link?

Dan

The W.L.M. client works fine, but I want to fix the storage folders before I change their location.

1. The bulk of my stored email is in a folder tree sub-branch of 'Recovered Items' - but my WLM Client has no such folder as 'Recovered Items'.

2. A top folder in my WLM Client is called 'ByName', but in the storage, 'ByName' folder has only a small number of (empty) folders, which get recreated if I delete them, and which get populated if I move emails into them in the Client.

3. 'Received' folder in storage is empty, but in my WLM Client it is well populated.

4. Outbox and Storage Folders have acquired '(1)' after them - which keeps returning if I delete it.

The W.L.M. client works fine, but I want to fix the storage folders before I change their location.

1. The bulk of my stored email is in a folder tree sub-branch of 'Recovered Items' - but my WLM Client has no such folder as 'Recovered Items'.

2. A top folder in my WLM Client is called 'ByName', but in the storage, 'ByName' folder has only a small number of (empty) folders, which get recreated if I delete them, and which get populated if I move emails into them in the Client.

3. 'Received' folder in storage is empty, but in my WLM Client it is well populated.

4. Outbox and Storage Folders have acquired '(1)' after them - which keeps returning if I delete it.