What do you mean with 'has changed'? Did you make any changes? Have you been requested to make changes?

You'll need to check with your email provider what the correct SMTP server settings are.

It doesn't matter whether they support Thunderbird or not, as long as this is standard SMTP.

Please post your Troubleshooting Information.

AppMenu button - Help - Troubleshooting Information

SMTP is still the server type. They just want you to change the server name to smtpa.bellaliant.net

I am configured according to their setup. They (Bell Aliant) just changed from SMTP port 25 to SMTPA port 2225 and in consultation with them I set up the configuration accordingly. It seems Thunderbird won't accept an SMTPA.

I have made the necessary changes...still get the smtpa.bellaliant.net not recognized message. Bell Aliant don't have any knowledge about Thunderbird.

There is no outbound server protocol called smtpa. This is a name change only by your provider. It does not take much knowledge to configure one email client over another one. You just enter the correct settings and it works. But telling you they do not support Thunderbird worked for them. You left them alone.

Here is their page for setting up Outlook. Just place the info shown there in the corresponding fields in Thunderbird.

http://support.bellaliant.net/system/selfservice.controller?CONFIGURATION=1013&PARTITION_ID=1&secureFlag=false&TIMEZONE_OFFSET=&CMD=VIEW_ARTICLE&ARTICLE_ID=3351

The smtpa works on gmail and on the Bell aliant webmail pg. The 'a' is apparently for 'authentication'. I enabled that but still no go. I'll take a peek at the outlook stuff.

There is no place I can find to enter my password.

You'll be prompted for the password once you got the server settings correct.

It is entered correctly, has been all along. When I have been prompted

for a password, only now and then,  it doesn't do any good, I still get smtpa.bellaliant.net not recognized.

Please post your Troubleshooting Information.

AppMenu button - Help - Troubleshooting Information

I don't know what or where that Appmenu button lives??

http://emailmafia.net/2012/11/12/thunderbird-17-user-interface-changes/

Port numbers over 1000 are routinely blocked by anti virus programs as there are very few legitimate internet uses for ports "up there" Check your anti virus / firewall allow port 2225 and insert an exception if not.

Note that Authenticated SMTP has been around since 1995, so your provider is about 15 years behind the times on the subject.

Most internet providers use port 587 and 465 where SSL transfer encryption in used. Apparently Bell still just do not get it.

I just use Avira (free) and don't see a place to allow 2225, same with windows firewall.

I'm on that link but can't locate the AppMenue button

I also see where your provider wants your complete email address entered for a username. Do you have it that way?

The AppMenu button is the small square with 3 lines in it. It is found at the far end of one of the tool bars. You can also get to the Help Menu by pressing the alt key to make the Menu Bar appear and choosing Help there.

I do have my complete email. I found the troubleshooting info

Troubleshooting Information This page contains technical information that might be useful when you're trying to solve a problem. If you are looking for answers to common questions about Thunderbird, check out our support website. Include account names (possibly identifying information) Application Basics Name Thunderbird Version 24.4.0 User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 Profile Folder (Local drive) Application Build ID 20140316131045 Enabled Plugins about:plugins Build Configuration about:buildconfig Crash Reports about:crashes Memory Use about:memory Mail and News Accounts ID Incoming server Outgoing servers Name Connection security Authentication method Name Connection security Authentication method Default? account1 (pop3) pop.bellaliant.net:110 None Normal password smpta.bellaliant.net:2225 None Normal password true account2 (none) Local Folders None Normal password Extensions Name Version Enabled ID British English Dictionary 1.19.1 false en-GB@dictionaries.addons.mozilla.org Dropbox for Filelink 1.0.1 false thunderbird-filelink-dropbox@mikeconley.ca Forward 0.18 false forward@mozdev.org Lightning 2.6.4 false {e2fda1a4-762b-4020-b5ad-a41df1933103} SlideShow 1.4.7 false slideshowski@totic.org Test Pilot for Thunderbird 1.3.9 false tbtestpilot@labs.mozilla.com Important Modified Preferences Name Value browser.cache.disk.capacity 358400 browser.cache.disk.smart_size.first_run false browser.cache.disk.smart_size.use_old_max false browser.cache.disk.smart_size_cached_value 358400 dom.max_chrome_script_run_time 0 extensions.lastAppVersion 24.4.0 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 Courier 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 Times New Roman 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 Arial 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 15 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 15 mail.openMessageBehavior.version 1 mail.winsearch.firstRunDone true mailnews.database.global.datastore.id c63e71b8-d672-4c23-b824-b191ee3cf75 network.cookie.prefsMigrated true places.database.lastMaintenance 1395838575 places.history.expiration.transient_current_max_pages 104858 places.history.expiration.transient_optimal_database_size 167772160 plugin.importedState true plugin.state.flash 0 plugin.state.java 0 plugin.state.npatgpc 0 plugin.state.npauthz 0 plugin.state.npctrl 0 plugin.state.npdeployjava 0 plugin.state.npdlplugin 0 plugin.state.npgoogleupdate 0 plugin.state.npitunes 0 plugin.state.nppdf 0 plugin.state.nppl 0 plugin.state.npqtplugin 0 plugin.state.nprndlchromebrowserrecordext 0 plugin.state.nprndlhtml5videoshim 0 plugin.state.nprndlpepperflashvideoshim 0 plugin.state.nprpplugin 0 plugin.state.npspwrap 0 plugin.state.npunity3d 0 plugin.state.npve3d 0 plugin.state.npwlpg 0 print.print_printer Brother MFC-240C USB Printer print.printer_Brother_MFC-240C_USB_Printer.print_bgcolor false print.printer_Brother_MFC-240C_USB_Printer.print_bgimages false print.printer_Brother_MFC-240C_USB_Printer.print_colorspace print.printer_Brother_MFC-240C_USB_Printer.print_command print.printer_Brother_MFC-240C_USB_Printer.print_downloadfonts false print.printer_Brother_MFC-240C_USB_Printer.print_duplex -1574483314 print.printer_Brother_MFC-240C_USB_Printer.print_edge_bottom 0 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print.printer_Brother_MFC-240C_USB_Printer.print_oddpages true print.printer_Brother_MFC-240C_USB_Printer.print_orientation 0 print.printer_Brother_MFC-240C_USB_Printer.print_page_delay 50 print.printer_Brother_MFC-240C_USB_Printer.print_pagedelay 500 print.printer_Brother_MFC-240C_USB_Printer.print_paper_data 1 print.printer_Brother_MFC-240C_USB_Printer.print_paper_height 11.00 print.printer_Brother_MFC-240C_USB_Printer.print_paper_name print.printer_Brother_MFC-240C_USB_Printer.print_paper_size 1611902952 print.printer_Brother_MFC-240C_USB_Printer.print_paper_size_type 0 print.printer_Brother_MFC-240C_USB_Printer.print_paper_size_unit 0 print.printer_Brother_MFC-240C_USB_Printer.print_paper_width 8.50 print.printer_Brother_MFC-240C_USB_Printer.print_plex_name print.printer_Brother_MFC-240C_USB_Printer.print_resolution 0 print.printer_Brother_MFC-240C_USB_Printer.print_resolution_name print.printer_Brother_MFC-240C_USB_Printer.print_reversed false print.printer_Brother_MFC-240C_USB_Printer.print_scaling 1.00 print.printer_Brother_MFC-240C_USB_Printer.print_shrink_to_fit true print.printer_Brother_MFC-240C_USB_Printer.print_to_file false print.printer_Brother_MFC-240C_USB_Printer.print_unwriteable_margin_bottom 0 print.printer_Brother_MFC-240C_USB_Printer.print_unwriteable_margin_left 0 print.printer_Brother_MFC-240C_USB_Printer.print_unwriteable_margin_right 0 print.printer_Brother_MFC-240C_USB_Printer.print_unwriteable_margin_top 0 Graphics Adapter Description AMD RADEON HD6550D Graphics Vendor ID 0x1002 Device ID 0x9640 Adapter RAM 512 Adapter Drivers aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Driver Version 8.892.0.0 Driver Date 9-8-2011 Direct2D Enabled false DirectWrite Enabled false (6.2.9200.16571) ClearType Parameters ClearType parameters not found WebGL Renderer false GPU Accelerated Windows 0 AzureCanvasBackend skia AzureFallbackCanvasBackend cairo AzureContentBackend none JavaScript Incremental GC 1 Accessibility Activated 1 Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.10.2 4.10.2 NSS 3.15.4 Basic ECC 3.15.4 Basic ECC NSS Util 3.15.4 3.15.4 NSS SSL 3.15.4 Basic ECC 3.15.4 Basic ECC NSS S/MIME 3.15.4 Basic ECC

What happens if you change pop.bellaliant.net:110 to pop.bellaliant.com port 110?

It seems weird that the pop server is .com and the smtp server is .net but that is how your provider has it on the setup page I copied earlier.

nope no dif. t They both are .net

Still not working, I'm stumped!