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cannot sign in with IMAP
Several days ago, my comcast email said it couldn't connect, and after trying a couple other things, I removed the account and tried to add it back on. When I try to add it as an IMAP account, it pulls up a window that loads for a minute then says "Unable to connect. An error occurred during a connection to localhost." On the thunderbird window where I entered my password, it says "Unable to log in at server. Probably wrong configuration, username, or password." I logged in on a browser, so I know the username and password are correct. I tried adding it as a POP account, and that worked fine, but I need it as IMAP.
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"Unable to connect. An error occurred during a connection to localhost."
Are you running a local web server? Or are you running some sort of anti-virus/security software which uses localhost? Comcast now requires OAuth2 authentication. The authentication fails when localhost is blocked by something else on your computer.