first of all thnx for the great work for me it works perfectly.
just 2 small things
when you activate it it creates the key we can copy paste this key but i dont think that people know that does not work
the key uses "xxxxxx" and we must copy the key without the " "
second is people may not know that they must use the selector --- mail._domainkey ---- in the txt records ---- do not forget the ._
I kind of miss small howto's for the plugins
maybe the key can be fixed so it is created without the " "
and a small howto document added to the zip file
anyway thnx again for the great work