This POP3 server does not allow plaintext passwords. Please try changing to 'Encrypted password' as the 'Authentication method' in the 'Account Settings | Server settings'.
Aqeddac POP3 ur  isirig ara awal uffiren n uḍris aččuran. Ma ulac aɣilif, snifel-it ɣer 'Awal uffi awgelhan' am 'Tarrayt n usesteb' deg 'Iɣewwaṛen n umiḍan| Iqewwaṛen n uqeddac'.