Comment 1 for bug 823629

Making a change to /usr/share/pyshared/openerp-server/addons/crm/wizard/crm_send_email.py at line 54

++ 'reply_to' : fields.char('Reply To', size=128, required=False, help="Reply-to of the Sales team defined on this case"),
-- 'reply_to' : fields.char('Reply To', size=128, required=True, help="Reply-to of the Sales team defined on this case"),

Makes the field no longer required.

The mail configuration on my test machine defaults the 'Reply To' to the 'From'.

From: Administrator <admin+from@domain>
Reply-to: Administrator <admin+replyto@domain>
To: ian@domain
Subject: Test with BOTH From and Reply

From: Administrator <admin+from@domain>
Reply-to: admin+from@domain
To: ian@domain
Subject: Test with ONLY From