What happens if you go to the settings for the account(s) in question, and manually set the SMTP server there? See attached.

Cheers, Dave

I've changed it and still an error message. https://app.box.com/s/qgkkofnsm47zp480oycsxxfbymbx6scx

Please post following info directly into this forum question - do not use app.box.com.

In Thunderbird Help > Troubleshooting Information click on 'Copy text to clipboard Paste the info into this forum question.

Do not edit anything - it will tell us exactly what Thunderbird is set up to use.

Application Basics

   Name: Thunderbird
   Version: 31.4.0
   User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
   Profile Directory: Open Directory

             (Unknown location)
   Application Build ID: 20150112185638
   Enabled Plugins: about:plugins
   Build Configuration: about:buildconfig
   Memory Use: about:memory

 Mail and News Accounts
   account2:
     INCOMING: account2, , (none) Local Folders, plain, passwordCleartext

   account3:
     INCOMING: account3, , (imap) imap.netregistry.net:993, SSL, passwordCleartext
     OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

   account5:
     INCOMING: account5, , (imap) imap.netregistry.net:993, SSL, passwordCleartext
     OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

   account6:
     INCOMING: account6, , (imap) imap.netregistry.net:993, SSL, passwordCleartext
     OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

   account7:
     INCOMING: account7, , (imap) imap.netregistry.net:993, SSL, passwordCleartext
     OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

   account9:
     INCOMING: account9, , (pop3) mail.crochead.com:110, plain, passwordCleartext
     OUTGOING: mail.crochead.com:465, SSL, passwordCleartext, true

   account10:
     INCOMING: account10, , (imap) imap.crochead.com.au:143, alwaysSTARTTLS, passwordEncrypted
     OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

   account11:
     INCOMING: account11, , (imap) mail3.bigcommerce.com:993, SSL, passwordCleartext
     OUTGOING: mail3.bigcommerce.com:587, alwaysSTARTTLS, passwordEncrypted, true

 Crash Reports

 Extensions
   Enigmail, 1.7.2, true, {847b3a00-7ab1-11d4-8f02-006008948af5}
   Lightning, 3.3.4, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
   Messaging Menu and Unity Launcher integration, 1.3.1, true, messagingmenu@mozilla.com
   Provider for Google Calendar, 0.32, true, {a62ef8ec-5fdc-40c2-873c-223b8a6925cc}

 Important Modified Preferences

   Name: Value

     browser.cache.disk.capacity: 204800
     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: 31.4.0
     general.autoScroll: true
     mail.openMessageBehavior.version: 1
     mailnews.database.global.datastore.id: 912c1d9f-f79f-4a8b-9bf5-5c273fa7a3c
     mailnews.database.global.indexer.enabled: false
     mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
     network.cookie.cookieBehavior: 2
     network.cookie.prefsMigrated: true
     places.database.lastMaintenance: 1424651152
     places.history.expiration.transient_current_max_pages: 104858
     plugin.importedState: true
     print.print_bgcolor: false
     print.print_bgimages: false
     print.print_colorspace: default
     print.print_downloadfonts: false
     print.print_evenpages: true
     print.print_in_color: true
     print.print_margin_bottom: 0.5
     print.print_margin_left: 0.5
     print.print_margin_right: 0.5
     print.print_margin_top: 0.5
     print.print_oddpages: true
     print.print_orientation: 0
     print.print_page_delay: 50
     print.print_paper_data: 0
     print.print_paper_height: 279.40
     print.print_paper_name: na_letter
     print.print_paper_size_type: 1
     print.print_paper_size_unit: 1
     print.print_paper_width: 215.90
     print.print_plex_name: default
     print.print_resolution_name: default
     print.print_scaling: 1.00
     print.print_shrink_to_fit: true
     print.print_to_file: false
     print.print_unwriteable_margin_bottom: 56
     print.print_unwriteable_margin_left: 25
     print.print_unwriteable_margin_right: 25
     print.print_unwriteable_margin_top: 25
     privacy.donottrackheader.enabled: true
     security.disable_button.openCertManager: false
     security.disable_button.openDeviceManager: false

 Graphics

     Adapter Description: X.Org -- Gallium 0.4 on AMD KABINI
     Vendor ID: X.Org
     Device ID: Gallium 0.4 on AMD KABINI
     Driver Version: 3.0 Mesa 10.1.3
     WebGL Renderer: false
     GPU Accelerated Windows: 0

     AzureCanvasBackend: cairo
     AzureSkiaAccelerated: 0
     AzureFallbackCanvasBackend: none
     AzureContentBackend: cairo

 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

Here are the images from the above links

account9:

    INCOMING: account9, , (pop3) mail.crochead.com:110, plain, passwordCleartext
    OUTGOING: mail.crochead.com:465, SSL, passwordCleartext, true

account10:

    INCOMING: account10, , (imap) imap.crochead.com.au:143, alwaysSTARTTLS, passwordEncrypted
    OUTGOING: smtp.netregistry.net:465, SSL, passwordCleartext, true

I notice that :

• account 10 imap account is not using the correct Outgoing Server SMTP.
• you only have one 'mail.crochead.com' outgoing server which is currently being used by pop account 9.

If both the POP and IMAP accounts 9 and 10 are actually using the same email address, just one happens to be pop and the other imap, then you need to select:

• Edit > Account Settings for imap crochhead mail account
• OUTGOING server (SMTP) to be mail.crochead.com (not smtp.netregistry.net).

but I would check that the 'mail.crochead.com' is correct for smtp on imap.

If the Pop mail account 9 is a completely different email address to imap account 10, you will need to create an smtp server for that account to use. Edit > Account Settings > Outgoing Server (SMTP) click on 'Add' button

• Description: IMAP Crochead
• server name: mail.crochead.com or ask your hosting company what it should be.

then use either of these options:

• port: 465
• Connection Security:SSL/TLS
• Authentication Method: Normal Password
• Username: email address of imap account 10

• port: 587
• Connection Security:STARTTLS
• Authentication Method: Normal Password
• Username: email address of imap account 10

click on OK

Once the correct smtp server has been created, then you need to point the IMAP mail account to use that smtp server.

• Edit > Account Settings for imap crochhead mail account
• OUTGOING server (SMTP) to be IMAP Crochead mail.crochead.com
• click on OK

re: Image which shows 'Thunderbird Preferences' window. The 'Update' tab is empty. This view refers to Thunderbird Program updates and has nothing to do with modifying and saving changes to account settings in your Profile folder. I'll try to check out this and get info.

re: Image which shows 'Thunderbird Preferences' window. The 'Update' tab is empty. ubuntu 14.04lts has probably done this. It has taken over control of updates of third party software. There is probably a 'software and updates' section that controls/allows various software updates. Located this: http://files.ubuntu-manual.org/manuals/getting-started-with-ubuntu/14.04/en_US/screen/Getting%20Started%20with%20Ubuntu%2014.04.pdf look at page 92.

This fully explains why you see a blank area in the Thunderbird Update tab. So you do not need to worry about it.