Recently I have noticed that domain keys suddenly no longer work on some domains after updating to the latest version.  I have had this happen on several of the recent updates.  Nothing else really changes except updating to the latest version of Smarter Mail.  I updated on Monday morning this week and then started getting complaints from clients that their mail was bouncing when sending.  Prior to this last update, they were able to send mail to the same client without issues.  When I checked the logs found out the domain key didn't match up.  So had to reissue another.  Started digging on other domains and found the same issue on several other domains that we host.  I have updated those but hope I do not have to do this everytime we update the software.  That gets to be a lot of work. Anyone else having the same issues?