Please post following info:

In Thunderbird

• 'Help' > 'Troubleshooting Information'
• Do Not select checkbox' include account names'
• Click on 'Copy text to clipboard' button

• In this forum question, right click in a 'Post a Reply' text box and select 'Paste'

This will insert all the information. But some is not required so you can remove all information on fonts and printers but nothing else.

Application Basics

   Name: Thunderbird
   Version: 52.7.0
   User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0
   Profile Folder: Open Folder

             (Local drive)
   Application Build ID: 20180322145026
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account1:
     INCOMING: account1, , (imap) imap-mail.outlook.com:993, SSL, passwordCleartext
     OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true

   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (nntp) news.newsgroup.la.:119, plain, passwordCleartext
     OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true

   account6:
     INCOMING: account6, , (imap) imap.gmail.com:993, SSL, OAuth2
     OUTGOING: , smtp.gmail.com:465, SSL, OAuth2, true

 Crash Reports

 Extensions
   Lightning, 5.4.7, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}

 Important Modified Preferences

   Name: Value

     accessibility.typeaheadfind.flashBar: 0
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     extensions.lastAppVersion: 52.7.0
     font.internaluseonly.changed: false
     font.name.monospace.el: Consolas
     font.name.monospace.x-cyrillic: Consolas
     font.name.monospace.x-unicode: Consolas
     font.name.monospace.x-western: Consolas
     font.name.sans-serif.el: Calibri
     font.name.sans-serif.x-cyrillic: Calibri
     font.name.sans-serif.x-unicode: Calibri
     font.name.sans-serif.x-western: Calibri
     font.name.serif.el: Cambria
     font.name.serif.x-cyrillic: Cambria
     font.name.serif.x-unicode: Cambria
     font.name.serif.x-western: Cambria
     font.size.fixed.el: 14
     font.size.fixed.x-cyrillic: 14
     font.size.fixed.x-unicode: 14
     font.size.fixed.x-western: 14
     font.size.variable.el: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     mail.openMessageBehavior.version: 1
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: 642a7127-7e30-4fd0-bf5b-8a6902bbf20
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     media.gmp.storage.version.observed: 1
     network.cookie.prefsMigrated: true
     network.predictor.cleaned-up: true
     places.database.lastMaintenance: 1523449191
     places.history.expiration.transient_current_max_pages: 60712
     security.sandbox.content.tempDirSuffix: {460931fe-ba62-4ad7-a661-ee21ac4af4eb}

 Graphics

     GPU #1
     Description: Intel(R) HD Graphics 630
     Vendor ID: 0x8086
     Device ID: 0x5912
     RAM: Unknown
     Drivers: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32
     Driver Version: 23.20.16.4973
     Driver Date: 2-28-2018

     Features
     Direct2D: false
     DirectWrite: true (10.0.16299.15)
     WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 630 Direct3D9Ex vs_3_0 ps_3_0) -- OpenGL ES 2.0 (ANGLE 2.1.0.2a250c8a0e15)

     AzureCanvasBackend: skia
     AzureCanvasAccelerated: 0
     AzureFallbackCanvasBackend: cairo
     AzureContentBackend: skia

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.13.1
     4.13.1

     NSS
     3.28.6
     3.28.6

     NSS Util
     3.28.6
     3.28.6

     NSS SSL
     3.28.6
     3.28.6

     NSS S/MIME
     3.28.6
     3.28.6

Please help, i didn't change the setting recently

I notice that your hotmail account uses the outlook server and also your newsgroup account.

Please confirm:

1. The 'From' was using the hotmail email address.
2. It was just you sending out a standard email from your hotmail - not connected to the newsgroup.

Please check the password and user name settings stored in Thunderbird.

• 'Menu icon' > 'Options' > 'Options' > 'Security' > 'Passwords' tab
• click on 'Saved Passwords' button

Do you see two lines showing information? One for imap://outlook mail account One for smtp://outlook mail account

• If yes click on 'Show Passwords' button

Does the User Name show correct email address ? Is password correct? check there are no blank spaces at the start or end of password and user name. If not correct, right click on line and use 'Edit Password' or 'Edit Username' as appropriate option If there are hidden blank spaces then the highlighted part will go beyond the text. see images below as example. first is good, second shows a blank space at start and also at end. completely clear content and retype password and or username as appropriate.

• click on 'Close'
• click on 'OK'

If you updated/modified anything...Exit thunderbird Wait a few moments for background processes to complete. Start Thunderbird.