Apologies in advance for my nub question.
Been using the Amazon EC2 Linux AMI and enjoying it.
It comes configured with sendmail. I think I'd rather use postfix.
I hoped replacing sendmail with postfix might be as simple as what I found searching online:
$ rpm -e sendmail $ yum install postfix.
However rpm complains:
$ rpm -e sendmail error: Failed dependencies: smtpdaemon is needed by (installed) mdadm-2.6.9-3.7.amzn1.i386
I'd be grateful for any guidance how to proceed.