Windows 10: Get message "mail server rejected the message". when trying to send email through Windows...

I've been using Windows Live Mail for 20 years but now cant send emails. Get message "Mail server rejected the message" each try. My TPG Post Office works OK so problem with Windows Live Mail which I prefer to use.PLEASE HELP a technically deficient 77 yo. THANKS.

:)

 

Lumia 950 receiving email fine, but cannot send messages

Hello,
Alex.

The Outgoing SMTP mail server port number depends on the your email service provider. We recommend that you contact your service provider and request for the incoming and outgoing mail server settings.

Remove the account that you're having issues sending messages, and add the account to your phone using the steps below.

Presuming that you have removed the email account you're having issues sending messages:

• Launch the Outlook Mail app.
• Tap Add account.
• Tap Advanced setup.
• Tap Internet email.
• Enter your email account credentials.
• Tap the Sign in button.

Let us know what happens after adding your email using the suggested steps.

 

How to stop Sys Admin from Bouncing messages - Outlook 2010 / Gmail

Can you address it using bcc: ? That way each recipient's mail server would only see it as being addressed to a single recipient, not the entire mailing list. May help to stop their Sys Admin rejecting it as spam.

 

Windows Mail will not send but will receive emails

Check your settings: right-click on the account name in the folder pane and select
Properties.

• On the Servers tab
  
  
  • Ensure that the Email username is your full email address
  • Ensure that Log on using clear text authentication is selected
  • 
    
  • Ensure that My server requires authentication is selected
• Click Apply and
  OK
  
  

Remove any unsent messages from the outbox (below the account folders in the folder pane), then compose a new test message with a unique subject and send it to yourself. Post any new error message in your reply.

[Note that Windows Live Mail is not the same as Windows Mail. The error message suggests that you're still on Vista using its inbuilt mail program. Your question has been moved to the right forum assuming that that is the case.]