postfix,courier-imap & mariadb - not allowing login

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http://www.linuxquestions.org – I am trying to setup postfix, courier-imap and mariadb for a local mail server for a purchased domain. machin is archlinux. so far, I have 1 user account set up for the mail. I am able to send out messages from this account by telnetting into localhost port 25. As well, postfix is listening on port 25 for incoming emails, and any email address on the internet is able to send mail to this server & it will accept them properly. However, I am now trying to login to the server via imap. I am trying currently by telnetting to localhost port 143. The connection attempt is made succesfully, but w (HowTos)