[http://forums.timewarnercable.com/t5/Email/account-is-locked-by-another-session-or-for-maintenance/td-p/86343 Maybe you have incorrect settings]? [https://www.timewarnercable.com/en/support/faqs/faqs-internet/e-mailacco/incoming-outgoing-server-addresses.html Time Warner FAQ] incoming POP server: mail.twc.com on port 110 (POP) or 143 (IMAP), Connection security = none, authentication = password, transmitted insecurely, User name = username@socal.rr.com outgoing SMTP server: mail.twc.com on port 587, Connection security = none, authentication = password, transmitted insecurely, User name = username@socal.rr.com Some users have suggested the problem is with POP accounts being accessed by other devices such as phones, but I suggest you try the above settings first.