Don't you just love these error messages? Someone coded it to deliver all those numbers so they know exactly how and where it went wrong. But try finding that person to explain it all...

If you post your troubleshooting information, maybe someone with a working Hotmail account will be able to advise on settings that work for them. But this doesn't really look like a settings issue, and might be a real problem at the server and hence nothing that you and I can fix.

In order for us to better investigate this issue you need to add a little more non-personal information.

Please add the troubleshooting information to your post. To find the Troubleshooting information:

• Open Help (or click on three-line-icon and select Help)
• Choose Troubleshooting Information
• Use the button Copy to clipboard to select all. Do not check box "Include account names"!
• Paste this in your post.

Please post back with this information and any other questions you might have.

Here's what I got when I did the Copy to clipboard that you requested.

 Application Basics

   Name: Thunderbird
   Version: 52.3.0
   User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0
   Profile Folder: Open Folder

             (Local drive)
   Application Build ID: 20170815040357
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory
   Profiles: about:profiles

 Mail and News Accounts
   account1:
     INCOMING: account1, , (none) Local Folders, plain, passwordCleartext

   account2:
     INCOMING: account2, , (pop3) pop3.live.com:995, SSL, passwordCleartext
     OUTGOING: , smtp.live.com:587, alwaysSTARTTLS, passwordCleartext, true

   account3:
     INCOMING: account3, , (pop3) pop3.live.com:995, SSL, passwordCleartext
     OUTGOING: , smtp.live.com:587, alwaysSTARTTLS, passwordCleartext, true

 Crash Reports

 Extensions
   Lightning, 5.4.3, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   McAfee Anti-Spam Thunderbird Extension, 2.0, false, msktbird@mcafee.com

 Important Modified Preferences

   Name: Value

     accessibility.lastLoadDate: 1496275696
     browser.cache.disk.capacity: 358400
     browser.cache.disk.filesystem_reported: 1
     browser.cache.disk.smart_size_cached_value: 358400
     browser.cache.disk.smart_size.first_run: false
     browser.cache.disk.smart_size.use_old_max: false
     dom.apps.reset-permissions: true
     extensions.lastAppVersion: 52.3.0
     font.internaluseonly.changed: true
     font.name.monospace.el: Consolas
     font.name.monospace.tr: Consolas
     font.name.monospace.x-baltic: Consolas
     font.name.monospace.x-central-euro: 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.tr: Calibri
     font.name.sans-serif.x-baltic: Calibri
     font.name.sans-serif.x-central-euro: 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.tr: Cambria
     font.name.serif.x-baltic: Cambria
     font.name.serif.x-central-euro: 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.tr: 14
     font.size.fixed.x-baltic: 14
     font.size.fixed.x-central-euro: 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.tr: 17
     font.size.variable.x-baltic: 17
     font.size.variable.x-central-euro: 17
     font.size.variable.x-cyrillic: 17
     font.size.variable.x-unicode: 17
     font.size.variable.x-western: 17
     gfx.direct3d.last_used_feature_level_idx: 0
     mail.openMessageBehavior.version: 1
     mail.winsearch.enable: false
     mail.winsearch.firstRunDone: true
     mailnews.database.global.datastore.id: 5691160d-cd64-49ee-b07c-72eade3db09
     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: 1507054437
     places.history.expiration.transient_current_max_pages: 59004
     plugin.importedState: true
     plugins.update.notifyUser: true
     print.print_printer: HP Color LaserJet 2600n
     print.printer_HP_Color_LaserJet_2600n.print_bgcolor: false
     print.printer_HP_Color_LaserJet_2600n.print_bgimages: false
     print.printer_HP_Color_LaserJet_2600n.print_colorspace:
     print.printer_HP_Color_LaserJet_2600n.print_command:
     print.printer_HP_Color_LaserJet_2600n.print_downloadfonts: false
     print.printer_HP_Color_LaserJet_2600n.print_duplex: 0
     print.printer_HP_Color_LaserJet_2600n.print_edge_bottom: 0
     print.printer_HP_Color_LaserJet_2600n.print_edge_left: 0
     print.printer_HP_Color_LaserJet_2600n.print_edge_right: 0
     print.printer_HP_Color_LaserJet_2600n.print_edge_top: 0
     print.printer_HP_Color_LaserJet_2600n.print_evenpages: true
     print.printer_HP_Color_LaserJet_2600n.print_footercenter:
     print.printer_HP_Color_LaserJet_2600n.print_footerleft: &PT
     print.printer_HP_Color_LaserJet_2600n.print_footerright: &D
     print.printer_HP_Color_LaserJet_2600n.print_headercenter:
     print.printer_HP_Color_LaserJet_2600n.print_headerleft: &T
     print.printer_HP_Color_LaserJet_2600n.print_headerright: &U
     print.printer_HP_Color_LaserJet_2600n.print_in_color: true
     print.printer_HP_Color_LaserJet_2600n.print_margin_bottom: 0.5
     print.printer_HP_Color_LaserJet_2600n.print_margin_left: 0.5
     print.printer_HP_Color_LaserJet_2600n.print_margin_right: 0.5
     print.printer_HP_Color_LaserJet_2600n.print_margin_top: 0.5
     print.printer_HP_Color_LaserJet_2600n.print_oddpages: true
     print.printer_HP_Color_LaserJet_2600n.print_orientation: 0
     print.printer_HP_Color_LaserJet_2600n.print_page_delay: 50
     print.printer_HP_Color_LaserJet_2600n.print_pagedelay: 500
     print.printer_HP_Color_LaserJet_2600n.print_paper_data: 1
     print.printer_HP_Color_LaserJet_2600n.print_paper_height: 11.00
     print.printer_HP_Color_LaserJet_2600n.print_paper_name:
     print.printer_HP_Color_LaserJet_2600n.print_paper_size_type: 0
     print.printer_HP_Color_LaserJet_2600n.print_paper_size_unit: 0
     print.printer_HP_Color_LaserJet_2600n.print_paper_width: 8.50
     print.printer_HP_Color_LaserJet_2600n.print_plex_name:
     print.printer_HP_Color_LaserJet_2600n.print_resolution: 0
     print.printer_HP_Color_LaserJet_2600n.print_resolution_name:
     print.printer_HP_Color_LaserJet_2600n.print_reversed: false
     print.printer_HP_Color_LaserJet_2600n.print_scaling: 1.00
     print.printer_HP_Color_LaserJet_2600n.print_shrink_to_fit: true
     print.printer_HP_Color_LaserJet_2600n.print_to_file: false
     print.printer_HP_Color_LaserJet_2600n.print_unwriteable_margin_bottom: 0
     print.printer_HP_Color_LaserJet_2600n.print_unwriteable_margin_left: 0
     print.printer_HP_Color_LaserJet_2600n.print_unwriteable_margin_right: 0
     print.printer_HP_Color_LaserJet_2600n.print_unwriteable_margin_top: 0
     security.sandbox.content.tempDirSuffix: {80efc9d0-40f0-4f1e-969a-6bd1a40e98ee}

 Graphics

     GPU #1
     Description: AMD Radeon(TM) R4 Graphics
     Vendor ID: 0x1002
     Device ID: 0x9851
     RAM: 512
     Drivers: aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64
     Driver Version: 15.201.1101.0
     Driver Date: 8-6-2015

     Features
     Direct2D: false
     DirectWrite: true (10.0.15063.413)
     WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon(TM) R4 Graphics 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
     3.28.5
     3.28.5

     NSS Util
     3.28.5
     3.28.5

     NSS SSL
     3.28.5
     3.28.5

     NSS S/MIME
     3.28.5
     3.28.5

Hmm, yes, the account settings don't tell us anything, They are the same for both accounts.

My own hotmail account looks like this:

     INCOMING: account46, , (imap) imap-mail.outlook.com:993, SSL, passwordCleartext
     OUTGOING: , smtp-mail.outlook.com:587, alwaysSTARTTLS, passwordCleartext, true

…but it isn't working either, that is, for sending.

But both the address I am using and the address you have respond to pings.

OK Thunderbird team, am I just stuck with a hotmail account on Thunderbird that I can't send, reply or forward from?

ConnieNorheim said

OK Thunderbird team, am I just stuck with a hotmail account on Thunderbird that I can't send, reply or forward from?

My (working) Hotmail outgoing server is smtp.office365.com on port 587, STARTTLS security, normal password authentication. Does your account have 2-step verification?

no I don't have 2 step verification

To me the error message suggests that you are using the wrong sender/from-address to send mails using your hotmail account. Please verify your outgoing server settings (SMTP) and double check if your e-mail address is correct. See also https://support.mozilla.org/en-US/kb/thunderbird-and-hotmail#w_configuring-the-outgoing-server

I followed the instructions in the article you posted. Both of my email accounts show smtp.live.com as the outgoing server setting. I changed the server setting for my hotmail account to smtp-mail.outlook.com as the article suggested but that didn't help, I still can't send mail with my hotmail account. My msn email account sends mail fine with the smtp.live.com outgoing server setting.

I went back through the steps again and this time I DID notice a box that was filled in incorrectly, edited it and so far it seems to be working. I've sent a couple messages that worked. Thank you so Onno Ekker for sending me the support article I needed.

I am getting the same problem with two Hotmail accounts. I have checked the settings against the solution above and they are correct for the faulty account using imap-mail.outlook.com. One works OK, the other rejects every email sent with the error SMTP settings are identical apart from the email address. "An error occurred while sending mail. The mail server responded: 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 16.55847:1D070000, 17.43559:0000000094000000000000000000000000000000, 20.52176:140F77820D004010F1030000, 20.50032:140F77827D174010F1030000, 0.35180:0A006682, 255.23226:F1030000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:0A00F384, 16.55847:94000000, 17.43559:0000000068010000000000001F00000000000000, 20.52176:140F77820D0000100A00F736, 20.50032:140F77827D170011B20E0000, 0.35180:00000000, 255.23226:00000000, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:140F7782, 4.21921:DC040000, 255.27962:FA000000, 255.1494:C0010000, 0.37692:0F010480, 0.37948:00000000, 5.33852:00000000534D545000000780, 4.56248:DC040000, 7.40748:010000000000010B31333A44, 7.57132:000000000000000033373A66, 1.63016:32000000, 4.39640:DC040000, 8.45434:216F010005186E23000000000000000033316638, 5.10786:0000000031352E32302E303633312E3031333A4442355052303230314D42323033373A66313230396638362D396533392D343432322D393665382D3831633931333166383230310031323835, 255.1750:0A006182, 255.31418:4F010000, 0.22753:0A002885, 255.21817:DC040000, 4.60547:DC040000, 0.21966:59010000, 4.30158:DC040000 [Hostname=DB5PR0201MB2037.eurprd02.prod.outlook.com]. Please check the message and try again"