(This is probs obvious but it's when I'm trying to Get Messages that the error comes up. Tried sending a test email from an Outlook account to the Thunderbird address and it failed to send.)

You'll need to obtain the correct server settings from your email provider. Once you have that, please post them here (or a link to a support site).

Can you also post your Troubleshooting Information please? Help (Alt-H) - Troubleshooting Information

Incoming Server mail.littleredfoxdesign.com Outgoing Server mail.littleredfoxdesign.com Username zac@littleredfoxdesign.com Password Your e-mail account password Incoming Port POP3 110 or IMAP 143 Outgoing Mail server (SMTP) Port 587 SSL NO SMTP Authentication Required Secure Authentication or SPA Needs to be turned off

— — — — — — — — — — — — — — — — — — — — — — — —  — — — — — — — — — — — — — — — — — — — — — — — — 

Troubleshooting Information

 Application Basics

   Name: Thunderbird
   Version: 31.7.0
   User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:31.0) Gecko/20100101 Thunderbird/31.7.0
   Profile Folder: Show in Finder
   Application Build ID: 20150507114201
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account1:
     INCOMING: account1, , (imap) mail.littleredfoxdesign.com:143, SSL, passwordCleartext
     OUTGOING: mail.littleredfoxdesign.com:587, SSL, passwordCleartext, true

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

 Crash Reports

 Extensions
   WebMail, 1.5.1, true, {3c8e8390-2cf6-11d9-9669-0800200c9a66}

 Important Modified Preferences

   Name: Value

     browser.cache.disk.capacity: 358400
     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
     extensions.lastAppVersion: 31.7.0
     font.internaluseonly.changed: false
     gfx.blacklist.direct2d: 3
     gfx.blacklist.layers.direct3d9: 3
     gfx.blacklist.webgl.msaa: 4
     mail.openMessageBehavior.version: 1
     mail.spotlight.firstRunDone: true
     mailnews.database.global.datastore.id: ef9a4857-a408-844a-87d1-5986a56b0d8
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     network.cookie.prefsMigrated: true
     places.database.lastMaintenance: 1433615797
     places.history.expiration.transient_current_max_pages: 104858
     plugin.importedState: true
     plugin.state.adobepdfviewernpapi: 0
     plugin.state.flash: 0
     plugin.state.java: 0
     plugin.state.logmein: 0
     plugin.state.quicktime plugin: 0
     plugin.state.silverlight: 0

 Graphics

     Vendor ID: 0x1002
     Device ID: 0x6741
     WebGL Renderer: false
     GPU Accelerated Windows: 1/1 OpenGL

     AzureCanvasBackend: quartz
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: none
     AzureContentBackend: quartz

 JavaScript

 Incremental GC: 1

 Accessibility

   Activated: 0
   Prevent Accessibility: 0

 Library Versions

     Expected minimum version
     Version in use

     NSPR
     4.10.6
     4.10.6

     NSS
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

     NSS Util
     3.16.2.3
     3.16.2.3

     NSS SSL
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

     NSS S/MIME
     3.16.2.3 Basic ECC
     3.16.2.3 Basic ECC

SSL NO

You have SSL turned on in your account settings. Turn it off (no security).

No luck with that.. I tried both of the top 2 options on the Authentication method menu.

The account settings were different before, the "ports" or whatever; when the hosting expired and they re-set it up there were a couple new details they sent me and I just changed those details in Thunderbird settings to match the new ones they gave.... is that right?

Can you post your Troubleshooting Information again? Just the 'Mail and News Accounts' section will do.

(I tried using "encrypted password" and password transmitted insecurely)

um I don't know how to say this. But have you actually tried going to your web site using a browser. I did and was informed that the site did not exist.

Server not found
Firefox can't find the server at www.littleredfoxdesign.com.

I tried looking up the domain at DNSstuff. Their reply is

Input domain littleredfoxdesign.com is not recognized.
Please run the DNSReport with proper input.

So I went to crazy domains. Crazy domains show the domain as available for $11.49. See http://www.crazydomains.com.au/domain-names/search/?domain=littleredfoxdesigns.com

So I think the real issue is you have not yet actually sorted things out with crazy domains. Or if you have they have not done anything with that information

I just have the name for now, haven't had a website made yet. There's no "s" at the end, it's just littleredfoxdesign.com, idk it's coming up as "Backorder" on the Crazy Domain site. I've just emailed them to check why it's not working, they sent me a confirmation email a couple days ago though to confirm it was ready to go and give me the new setup details. GAH >:-(

Regardless of my typo. What is important is that there is nothing in DNS or whois about the domain.

Look their own whois server shows it pending delete, expired in April. http://www.crazydomains.com.au/whois/littleredfoxdesign.com/#result

Until such public information is corrected your not likely to be able to connect because Thunderbird can not find the server. There is no DNS record to point to it.

Thanks man, after I emailed them they realised and refunded what I just paid them, apparently it's gonna be relisted in a few days.