The IMAP server %S does not seem to support encrypted passwords. If you just set up the account, please try changing to 'Password, transmitted insecurely' as the 'Authentication method' in the 'Account Settings | Server settings'. If it used to work and now suddenly fails, this is a common scenario how someone could steal your password.
Zda se, až IMAP-serwer %S njepódpěra skoděrowane gronidła. Jolic sy konto rowno zarědował, wubjeŕśo pšosym 'Gronidło, njewěsćej pśenjasone' ako 'awtentificěrowańska metoda' w 'Kontowe nastajenja | Serwerowe nastajenja'. Jolic to howac funkcioněrujo a něnto naraz nic, jo to zwětšego pśiznamje, až něchten by mógał wašo gronidło kšadnuś.