Dovecot error

Hi, just setup the webpanel and everything looks fine. Except for 1 thing and that's Dovecot. It gives me an error with starting. keeps on failing with this message:
Starting Dovecot Imap: doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf line 135: Unknown setting: managesieve_max_line_length
[FAILED]
I's searched the forum but couldn't find it and over the net it has to much different dependencies.

remove dovecot

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yum remove dovecotand then reinstall it by this command

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yum install dovecot
see if your problem is resolved now or not

Hello,

better way to change the line: managesieve_max_line_length to sieve_max_line_length