I have been using Opera mail for several months to handle several online email accounts, both yahoo and ymail.
Yesterday it just seems to have stopped working for all accounts without me changing a thing. On three of the accounts I now see a yellow triangle but with the other three I do not. But I am not receiving mail into any account.
It does appear to be yahoo as if I send from a yahoo account online (ie in firefox) to my outlook.com account Opera Mail picks it up.
Any ideas what is going on?