Cannot connect to any smtp server
My OS is ubuntu 14.10 LTS, I am using Thunderbird version 38.4.0. I have 2 accounts, a gmail account and an office365 mail account. Up until yesterday I was able to send and receive emails on both accounts, however now it fails with the following error:
Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.googlemail.com failed. The server may be unavailable or is refusing Outgoing server (SMTP) connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.
(Or a similar message when connecting to the office 365 smtp server.)
I have restarted the computer, confirmed the server addresses, reset the passwords, confirmed I can ping the servers.
Any assistance would be greatly appreciated.
Thanks
Chris
Ñemoĩporã poravopyre
Your server settings for Gmail look good. I'm not really familiar with Office365, but they're probably ok as well.
Is there any external firewall or proxy you have to go through? Do you have Internet access from that machine at all?
What's suspicious that both accounts fail at the same time. So my best guess is that the cause is rather external, and not Thunderbird.
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Please post your Troubleshooting Information.
At the top right of the Thunderbird window, click the menu button 
, then select Help > Troubleshooting Information.
Press the Copy text to clipboard button and paste the information into your reply.
As requested, here is my troubleshooting information:
Application Basics
Name: Thunderbird Version: 38.4.0 User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 Profile Directory: Open Directory
(Local drive) Application Build ID: 20151125201005 Enabled Plugins: about:plugins Build Configuration: about:buildconfig Memory Use: about:memory
Mail and News Accounts
account1:
INCOMING: account1, , (imap) outlook.office365.com:993, SSL, passwordCleartext
OUTGOING: smtp.office365.com:587, alwaysSTARTTLS, passwordCleartext, true
account2:
INCOMING: account2, , (none) Local Folders, plain, passwordCleartext
account3:
INCOMING: account3, , (imap) imap.googlemail.com:993, SSL, passwordCleartext
OUTGOING: smtp.googlemail.com:465, SSL, passwordCleartext, true
Extensions
Lightning, 4.0.4.1, true, {e2fda1a4-762b-4020-b5ad-a41df1933103}
Messaging Menu and Unity Launcher integration, 1.3.1, true, messagingmenu@mozilla.com
Provider for Google Calendar, 1.0.4, true, {a62ef8ec-5fdc-40c2-873c-223b8a6925cc}
Important Modified Preferences
Name: Value
accessibility.typeaheadfind.flashBar: 0
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
browser.display.background_color: #000000
browser.display.document_color_use: 2
browser.display.foreground_color: #FFFFFF
browser.display.use_document_colors: false
extensions.lastAppVersion: 38.4.0
mail.openMessageBehavior.version: 1
mailnews.database.global.datastore.id: b32b4ffe-00cf-4814-a3f1-5e0340aac7c
mailnews.database.global.views.conversation.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
mailnews.database.global.views.global.columns: {"threadCol":{"visible":true,"ordinal":"1"},"flaggedCol":{"visible":true,"ordinal":"3"},"attachmentCol":{"visible":false…
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1450315423
places.history.expiration.transient_current_max_pages: 104858
plugin.importedState: true
plugin.state.librhythmbox-itms-detection-plugin: 0
plugin.state.libtotem-cone-plugin: 0
plugin.state.libtotem-gmp-plugin: 0
plugin.state.libtotem-mully-plugin: 0
plugin.state.libtotem-narrowspace-plugin: 0
Graphics
Adapter Description: Intel Open Source Technology Center -- Mesa DRI Intel(R) Haswell Desktop
Vendor ID: Intel Open Source Technology Center
Device ID: Mesa DRI Intel(R) Haswell Desktop
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
4.10.10
4.10.10
NSS
3.19.2.1 Basic ECC
3.19.2.1 Basic ECC
NSS Util
3.19.2.1
3.19.2.1
NSS SSL
3.19.2.1 Basic ECC
3.19.2.1 Basic ECC
NSS S/MIME
3.19.2.1 Basic ECC
3.19.2.1 Basic ECC
Ñemoĩporã poravopyre
Your server settings for Gmail look good. I'm not really familiar with Office365, but they're probably ok as well.
Is there any external firewall or proxy you have to go through? Do you have Internet access from that machine at all?
What's suspicious that both accounts fail at the same time. So my best guess is that the cause is rather external, and not Thunderbird.
Ah, yes - I just went and checked with IT - something was sending so much we got blacklisted, so they blocked all SMTP outgoing messages, and put a proxy in place. (Would have been nice if they had sent around an email. Oh well.)
Thanks for your help!