According to [https://www.spectrum.net/support/internet/spectrum-email-server-settings/ this page], the incoming and outgoing server is mail.brighthouse.com. The outgoing server port is 587, and the connection security is (probably) SSL/TLS, like it is for Charter users. https://support.mozilla.org/en-US/questions/1234783 [https://www.myidealtricks.com/tampabay-roadrunner-email-settings/ Some sources] suggest mail.twc.com for the mail server.