dovecot service problem

[Maung Nanda Linn Aung]

when i restrart the machine and dovecot is failed and shows


doveco imapt:FATAL  can't use SSL certificate  
/etc/pki/dovecot/dovecot.pem : permission denied

i cannot as well start the


service dovecot start

it all failedddd

any suggestions?
thanks in advance

i was configuring sendmail
reading with

http://www.linuxhomenetworking.com/linux-hn/sendmail.htm

thanks alot

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Best Regards,

Linn
nandalinnaung at gmail.com