hi my vpopmail is working fine and sqwebmail is also working very fine and read mail.but courier imap isnot authenticate the users through php and telnet 0 143 ready imap.. a1 login zafar@.... zafar a1 nologin failed. and now no user can be login in the domain.and courier imap is not working properly. plz suggest me what i do to authenticate it. or i reinstall it. thanks with regards and wait for ur reply.