Thanks for taking the time to submit this bug.
It looks like the parameter 'myhostname' in the file /etc/postfix/main.cf has an ending '.', which is invalid. Could you please change the line from something like
myhostname = cbest-desktop.hsd1.nm.comcast.net.
to
myhostname = cbest-desktop.hsd1.nm.comcast.net
and let us know if that solves your problem.
Thanks for taking the time to submit this bug.
It looks like the parameter 'myhostname' in the file /etc/postfix/ main.cf has an ending '.', which is invalid. Could you please change the line from something like
myhostname = cbest-desktop. hsd1.nm. comcast. net.
to
myhostname = cbest-desktop. hsd1.nm. comcast. net
and let us know if that solves your problem.