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I receive incoming email on Thunderbird, but cannot send mail. I have used Thunderbird for years, never updated it and this problem just started yesterday (7/25/23). I have gotten an error message saying "login to server smtp.nycap.rr.com failed". I have called my ISP, Spectrum, and ascertained that my email account with them is functioning, so the issue is something with Thunderbird.

On January 21st 2025 I changed my Spectrum account password. Almost immediately Thunderbird could not log into the spectrum maintained "mail.twc.com" server. When I called Spectrum support I was told the old Spectrum use of separate passwords for SMTP and IMAP was changed to use the same password as the spectrum web page which is now the same for all spectrum logins, a "one password to rule them all" scheme in November 2024. I changed the passwords in Thunderbird for IMAP and SMTP, but it still will not connect. If I do an auto populate attempt, the server actually responds with the correct setting so I know I am reaching the server. After five days trying to resolve the issue with Spectrum I was told this is a know issue with Thunderbird and it is not the server but the third party application. It is bad enough they reconfigure things like this without disclosing it. It baffles me that the changes they claim were made in November 2024 only make themselves known when the service stops working nearly three months after the change and only when I changed the web site password. Anyone know how to solve this? Thank you so much in advance.

I’ve used Tbird for 15+ years. I needed to install a new, clean install. Deleted everything from win.10. The minute the new Tbird 115. Tried to install. A pop up window said my password and user name failed to connect to my server Spectrum. no matter how many times I tried latest config. And password . It would continue to reject it. I only have one email address for 15 years. But it keeps rejecting the password. Tried switching from pop3 to IMAP. Can’t get past the log in box. And therefore I can’t get a blank, clean new install. I have deleted every remnant of Tbird. I’ve tried this 30 times this past month. And the same result happens. The pix show what happened the first time I tried to reinstall. Now I can’t even get to those options. All that happens is the constant rejection of either the password or the server domain name. Like spectrum “(mail.two.com) or mail.spectrum.net. Those are Spectrum’s server domain names that always worked. And still do.Just not with MY Tbird. I don’t want to have to surrender and switch to Outlook. I love Tbird. I started using it in the days when it was part of Netscape in 1998.

Please help thanks Michael

Hello, I can receive emails but I can't send them.. I use spectrum and all my settings are according to their designations.. See below for the snap shot of the smtp settings... I checked my password several times and that's correct too... I need help please! Jerry