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Can't send email after every new version of thunderbird downloaded

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Every time I download new version of thunderbird I suddenly cannot send emails, I can receive fine. It's so maddening ughh Once this happens I spend many hours searching support and it takes forever to find the answer. Some times it's a simple server setting change is the fix or adding @.... after the username but now this is not working

Please please help

Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4003a.ext.cloudfilter.net cmsmtp 138.199.21.216 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL100

My settings are: SMTP port 587 starttls normal password

Server serrings pop.shaw.ca port 995 ssl/tls normal password

Many thanks in advance

Every time I download new version of thunderbird I suddenly cannot send emails, I can receive fine. It's so maddening ughh Once this happens I spend many hours searching support and it takes forever to find the answer. Some times it's a simple server setting change is the fix or adding @.... after the username but now this is not working Please please help Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4003a.ext.cloudfilter.net cmsmtp 138.199.21.216 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL100 My settings are: SMTP port 587 starttls normal password Server serrings pop.shaw.ca port 995 ssl/tls normal password Many thanks in advance

All Replies (18)

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Toad-Hall said

The IP address mentioned in the error message seems to be provided by Xplornet Communications who are an ISP (Internet Service Provider). Yes Usually when using Port 587, Connection SEcurity is STARTTLS, but I noticed whilst shaw say to use it for mobile/andriod, they do state something slightly different to the norm - use SSL/TLS, so maybe they really do want that specific setting. No, SSL/TLS defaults to port 465, I tried both 465 and 587 with these settings and no good Edit each smtp server for area that is bold.
  • SMTP Outgoing Mail Server Information:
  • Outgoing Mail Server: mail.shaw.ca
  • Outgoing Port: 587
  • Connection Security: SSL/TLS
  • Authentication Method: Normal Password
  • Username: Shaw email address without the @shaw.ca
  • Click on OK
REstart Thunderbird Then check the Password area to ensure it has been properly updates. The 'UserName' should only have the first part - Shaw email address without the @shaw.ca If still not working..... Can you provide some clear images which show the following as we need to be certain that all your accounts are not accidentally using a wrong authentication.
  • Account Settings - bottom of Left Pane - select Outgoing Server SMTP to see full List of outgoing servers.
  • Select each outgoing server in that list to display it's contents in the lower section
  • Post image of each.
then for each mail account:
  • In Left Pane select mail account name - on bottom right its shows the selected 'Outgoing Server SMTP'.
  • Post image showing name of account on left and selected outgoing server on right.
It would be helpful to post images in the forum, but if you feel uncomfortable in posting those images - you could send them direct to myself purely for checking all is ok in that section. Use this email address which I've typed phonetically to avoid spam bots, so where I say 'at' replace with '@'. Email : mail at anje dot co dot uk I will do that but can you tell me how to do a screenshot in thunderbird? I can do screenshots in firefox but thunderbird I don't know how

Okulungisiwe ngu glassmancanada

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Toad-Hall said

The IP address mentioned in the error message seems to be provided by Xplornet Communications who are an ISP (Internet Service Provider). Yes Usually when using Port 587, Connection SEcurity is STARTTLS, but I noticed whilst shaw say to use it for mobile/andriod, they do state something slightly different to the norm - use SSL/TLS, so maybe they really do want that specific setting. No, SSL/TLS defaults to port 465, I tried both 465 and 587 with these settings and no good Edit each smtp server for area that is bold.
  • SMTP Outgoing Mail Server Information:
  • Outgoing Mail Server: mail.shaw.ca
  • Outgoing Port: 587
  • Connection Security: SSL/TLS
  • Authentication Method: Normal Password
  • Username: Shaw email address without the @shaw.ca
  • Click on OK
REstart Thunderbird Then check the Password area to ensure it has been properly updates. The 'UserName' should only have the first part - Shaw email address without the @shaw.ca If still not working..... Can you provide some clear images which show the following as we need to be certain that all your accounts are not accidentally using a wrong authentication.
  • Account Settings - bottom of Left Pane - select Outgoing Server SMTP to see full List of outgoing servers.
  • Select each outgoing server in that list to display it's contents in the lower section
  • Post image of each.
then for each mail account:
  • In Left Pane select mail account name - on bottom right its shows the selected 'Outgoing Server SMTP'.
  • Post image showing name of account on left and selected outgoing server on right.
It would be helpful to post images in the forum, but if you feel uncomfortable in posting those images - you could send them direct to myself purely for checking all is ok in that section. Use this email address which I've typed phonetically to avoid spam bots, so where I say 'at' replace with '@'. Email : mail at anje dot co dot uk I will do that but can you tell me how to do a screenshot in thunderbird? I can do screenshots in firefox but thunderbird I don't know how
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sfhowes said

Shaw smtp is mail.shaw.ca on 587, STARTTLS, normal password, User Name = part before @. Shaw POP is pop.shaw.ca on 995, SSL/TLS, normal password, User Name = part before @. Shaw IMAP is imap.shaw.ca on 993, SSL/TLS, normal password, User Name = part before @. Once you enter the correct settings, it's recommended to run Windows in safe mode to eliminate VPN, antivirus etc. as sources of error.

This is where the settings were and was working fine, now they don't work

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glassmancanada said

sfhowes said

Shaw smtp is mail.shaw.ca on 587, STARTTLS, normal password, User Name = part before @. Shaw POP is pop.shaw.ca on 995, SSL/TLS, normal password, User Name = part before @. Shaw IMAP is imap.shaw.ca on 993, SSL/TLS, normal password, User Name = part before @. Once you enter the correct settings, it's recommended to run Windows in safe mode to eliminate VPN, antivirus etc. as sources of error.

This is where the settings were and was working fine, now they don't work

Those are the correct, verified settings, so if mail isn't working, barring a server outage, an external app is probably the cause - hence a test in Windows safe mode is suggested.

Check your region for outages:

https://support.shaw.ca/t5/service-updates-outages/tkb-p/service-updates

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I don't know how to run in safe mode or what it even does.......old school here

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A quick search for 'Windows 10 safe mode' would explain how safe mode bypasses startup apps like antivirus:

https://support.microsoft.com/en-us/windows/start-your-pc-in-safe-mode-in-windows-92c27cff-db89-8644-1ce4-b3e5e56fe234

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How do I do a screen shot in thunderbird? I'll post my settings

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glassmancanada said

How do I do a screen shot in thunderbird? I'll post my settings

Thunderbird must be running and displaying the area with information. Press the 'Prt Scr' key on your keyboard and this takes a screenshot. Open a simple Paint Program. I'm using Windows, so I in windows search I type: Paint and select the 'Paint' app. Paint app opens and In the middle right click and select 'Paste' It auto puts the screenshot into 'Paint'

You can now edit that image to clean it up if you feel it's required. On Paint Toolbar -Home tab- click on the 'Select' icon. This now allows you to select the area in the image which you want to keep. Then click on 'Crop'. File > Save as > Jpeg Choose where to save eg: desktop Give it a name and click on Save. Then upload the image to this website. In this question type something relevant in text box. Below text box is 'Add images' - click on 'Browse' button locate the jpeg image saved on desktop, select it and click on 'Open' It gets uploaded as small thumbnail image. You can add more images in same area - you do not have to keep posting a comment for each image. Then click on 'Post Reply'

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Toad-Hall, I sent the screen shots to your email

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Screenshots received. All settings look good. Each account is using it's own smtp.

When you sent me the email, you used your main email address, but I'm assuming you sent via your shaw webmail account via a browser / zimbra ? The headers show your email address went through the shw-obgw-4003a.ext.cloudfilter.net perfectly ok. So this seems to be about your IP address or the content of the email.

I notice the images show you normally use a signature which appears to be an image stored on your computer. The main account shows you previously had a signature in the 'Signature text' box. Currently not being used.

TEST: Remove the signature file and then try to send an email to me without any signature, just a simple email with no links and no images and I'll look out for it.

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Tried that and got this again Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: shw-obgw-4002a.ext.cloudfilter.net cmsmtp 174.35.168.239 is listed on Cloudmark CSI-Global. Please visit:// https AUP#IPBL1000.

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How are you connecting to the internet when sending mail? WiFi? Perhaps your neighbors unsecured service or a coffee shop?

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wifi no coffee shop

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As cloudmark have no problem with email address and the content has nothing that would flag a spam then this problem is probably the IP address.

You get error messages which are showing different IP addresses. 138.199.21.216 174.35.169.23 174.35.168.239

WIFI Who is your ISP - Internet Service Provider ? Matt has made a very valid point. It sounds like you are trying to send using a wifi network on which you are not authorised. Check your Network connection. You will probably have several WIFI connections that display. It is possible the computer is auto using one that it finds, but it's not necessarilly your own secure wifi connection.

Use an ethernet cable to connect computer to your router. Create an Ethernet Network connection using User name and Password from your Internet service provider.

You would need an ethernet cable should you need to ever run your computer in 'Safe Mode with Networking', and they are not expensive. You may have one from when you got the router which may have been supplied by your ISP.

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isp is xplore and computer is connected to my own secure network Different ip's were due to vpn Laptops don't come with ethernet ports any longer, at least mine doesn't

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glassmancanada said

isp is xplore and computer is connected to my own secure network Different ip's were due to vpn Laptops don't come with ethernet ports any longer, at least mine doesn't


re: Different ip's were due to vpn I would advise that you switch off the VPN or create a tunnel so that Thunderbird can operate outside it. Many servers can get unhappy about IP addresses that appear to come from a variety of locations - they think someone is trying to hack the account, so they can just block access.

re:Laptops don't come with ethernet ports any longer, at least mine doesn't OK, you have purchased a slimline design, so it doesn't have the thickness to support that type of connection. In that case you would need to buy a USB Ethernet adapter into which you can insert an ethernet cable. This is not an expensive item.

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That's not really a solution and I could have the same problem

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Started working again not sure why. Prompted password and then was fine

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