APOP Problem

[Desmond Lim]

Hi all,

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I'm using qpopper 4 on RH6.1. I'm also using APOP authentication. It seems
that something is wrong even if I follow the installation guide closely.
I get this error in my maillog
"-ERR [AUTH] You must use stronger authentication such as AUTH SCRAM-MD5 or
APOP to connect to this server".

Does anyone know how to resolve this?