DNS seems solvedf yes
But there was an another error:
warning: %post(dovecot-1:2.2.10-4.el7_0.1.x86_64) scriptlet failed, exit status 1
Non-fatal POSTIN scriptlet failure in rpm package 1:dovecot-2.2.10-4.el7_0.1.x86_64
But there was an another error:
warning: %post(dovecot-1:2.2.10-4.el7_0.1.x86_64) scriptlet failed, exit status 1
Non-fatal POSTIN scriptlet failure in rpm package 1:dovecot-2.2.10-4.el7_0.1.x86_64