November 15, 2018 Windows 10 update causing inabilty to send Thunderbird emails - timeout occurs
Using Mozilla Thunderbird mail service, which was working properly until Microsoft auto downloaded Windows 10 update. At that point, thou I can receive emails, I cannot now send emails using Thunderbird.
I contacted the internet service provider who confirmed my internet settings including STMP server incoming and outgoing server numbers.
The Windows update caused a problem with my webmail service - same time out problem. Charter / Spectrum webmail service acknowledged this problem with the latest Windows update, requiring me to turn off computer and disconnect my router and modem. After reconnecting and starting up, my webmail service worked, but my Thunderbird out going mail time out problem remained.
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I haven't had, or heard about, any problems with sending after the 1809 W10 update. What is more likely is that you have a security program scanning outgoing mail, and that program is not fully compatible with the W10 update. If you have an AV set to scan outgoing mail, disable that feature and see if sending works. Or, run in Windows safe mode to isolate startup programs such as AV.
Hello,
I turned off my McAfee real time scanning and firewall, then sent a test email to myself, but problem remains. Email times out before completing the operation.
Other AV, CCleaner and Super Anti-Spyware need to be invoked to check on problems, so these should not have an impact on the timeout problem
Turning off the real-time scanning is neither necessary nor recommended. It's the email scanning that should be disabled. Best way to rule out 3rd-party interference is to run in Windows safe mode.
Unfortunately, when I went to safe mode with connections, I still had trouble connecting to internet. I was not in "airplane" mode or tablet" mode or any of these.
So I was not able to try sending an email. in safe mode.
Do you have a VPN? If so, that will surely interfere with sending mail. Also, since sending doesn't work in Windows safe mode, it appears to point to a network issue such as a router firewall blocking outgoing ports, or a faulty network adapter driver. Perhaps you can try it on another network. Sometimes even restarting the router/modem can fix problems like this.
I have VPN on my homepage, and selectively use to open a few reports, but nothing routine or automatically invoked.
I have disconnected both router and modem, with negative results.
Note that I have been sending emails using my webmail service the past couple of days.
Sending through webmail uses a different process than sending with TB. Which VPN, and do they give instructions for sending over smtp with email programs? Try disabling the VPN entirely and see if it makes any difference.