[Dovecot] what does it mean first_uid

[Gökhan Alkan]

  i installed qmail + vpopmail + dovecot.i installed
dovecot without problems.but i run 
telnet localhost 143
x login user password

it seems to error about first_uid.and i change
first_uid vpopmail_uid (89) its ok.but i dont
understand first_uid.and sholud i change last_uid ,
first_gid ,last_guid . do you recommend it

 thanks everynbody


		
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