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.
Tha coltas nach eil am frithealaiche %S a' cur taic ri faclan-faire crioptaichte. Ma tha thu dìreach air an cunntas seo a chruthachadh, feuch is atharraich an "Dòigh dearbhaidh" gu "Facal-faire, 'ga thar-aiseag gu mì-thèarainte" ann an "Roghainnean a' chunntais | Roghainnean an fhrithealaiche". Nam b' àbhaist dha a bhith ag obair mar bu chòir is ma dh'fhàillig e gu h-obann, seo suidheachadh cumanta far am b' urrainn do chuideigin am facal-faire agad a ghoid.