The Outgoing server (SMTP) %S does not allow plaintext passwords. Please try changing the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)' to 'Encrypted password'.
Ní cheadaíonn an freastalaí amach (SMTP) %S focail fhaire neamhchriptithe. Ba chóir duit an 'Modh fíordheimhnithe' faoi 'Socruithe an Chuntais | Freastalaí amach (SMTP)' go 'Focal faire criptithe'.