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Outgoing email has stopped since Thunderbird update

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pcharron
pcharron
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Outgoing smtp from Thunderbird has stopped since update. I have reviewed all the documentation and been in contact with my provider and still have been unable to resolve the problem. I am very frustrated with this issue. I attempted the SSL/TLS reversion back to version 1 and this did not help.

I have tried changing the port number to that suggested my my provider which for outgoing is supposed to be 587, although 24 has always worked. They also suggested changing the server name to mail.twc.com which did not work. They suggested the full email in the User Name field, which I did with various combinations of port numbers and server names and none have worked.

When I attempt to send I get the following error: The message could not be sent because connecting to Outgoing server (SMTP) smtp-server.rochester.rr.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.

When I use changed settings as described above I just get a timed out error as though there is no connection at all.

Screenshot of SMTP settings as they have always been attached. Email provider rochester.rr.com. ISP Spectrum. No firewall. Virus protection Bitdefender v. 27.0.23.112. OS Windows 11 Home build 22621.2428. Thunderbird version 115.4.1

Please assist

Outgoing smtp from Thunderbird has stopped since update. I have reviewed all the documentation and been in contact with my provider and still have been unable to resolve the problem. I am very frustrated with this issue. I attempted the SSL/TLS reversion back to version 1 and this did not help. I have tried changing the port number to that suggested my my provider which for outgoing is supposed to be 587, although 24 has always worked. They also suggested changing the server name to mail.twc.com which did not work. They suggested the full email in the User Name field, which I did with various combinations of port numbers and server names and none have worked. When I attempt to send I get the following error: The message could not be sent because connecting to Outgoing server (SMTP) smtp-server.rochester.rr.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. When I use changed settings as described above I just get a timed out error as though there is no connection at all. Screenshot of SMTP settings as they have always been attached. Email provider rochester.rr.com. ISP Spectrum. No firewall. Virus protection Bitdefender v. 27.0.23.112. OS Windows 11 Home build 22621.2428. Thunderbird version 115.4.1 Please assist
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sfhowes
sfhowes
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Spectrum/TWC settings are hard to pin down. I think the server should be mail.twc.com, according to Spectrum.

Try these settings: mail.twc.com on port 587, STARTTLS security, normal password, User Name = email address. If that doesn't work, try the same but with SSL/TLS security (choose the security, then type in 587).

In the event that Bitdefender is interfering, I suggest running Windows in safe mode to bypass startup apps ('disabling' BD not sufficient).