Receiving a can't connect to server error trying to send email also not receiving email

If it worked previously, then the problem is most likely a network issue. Either that or a firewall or antivirus interruption. This not something thunderbird can cause on its own. Sometimes, extending the timeout works , so you may wish to try this::

1. click to settings>general
2. scroll to the bottom and, on the right, is 'config editor'. click that
3. enter this: mailnews.tcptimeout
4. I think you will see the default setting is 100. Change to 250 save and exit
5. restart thunderbird and see if that works. Also, recheck config editor to be sure your change took.

did these steps and verified change no help

Well, it may be that the server is down for maintenance. Or try a higher number than 250. Just guesses, as I have no iea why it suddenly stopped for you.

Have been working with chatgpt and we found that using Powershell commands we can verify Thunderbird can see and talk to all Spectrum's ports, but sending mail it timeouts and it never receives mail it just says done. I checked on my PC and it was running an older version of Thunderbird and it is also having the same issue. I run Norton 360 and I disabled it and verified I have no VPN running. I have power cycled my systems modem and rotor. No help. Spectrum claims this is a Thunderbird issue and refuses to assist.

Hope someone with Thunderbird software/hardware team can help.

I have been on this forum for over four years, seeing many Spectrum problems and have yet to see Spectrum accept responsibility for anything. My recollection is that Spectrum offers no email support except for web access. The Connect 10060 error message is a server timeout. All I can suggest is trying a higher server timeout value, although I am no hardware guru, so others may have better suggestions.

thks for trying to help I will attempt to up the timeout value

Try a much higher number. I have never tried 1000 but that may work.

with chatgtp help I converted/created imap accounts and I can now receive but i still can't send. I have the timeout set to 1000