DKIM signing

Question

In EAP2 i saw the feature DKIM signing, how can i implement this on my test site. 
 I've got an Exchange server on the inside, MTA is on and working for email in both directions. 
 The DKIM verification part is clear to me but the signing part, where and how do i get a key? 
 
 Thanks in advance. 
 
 Bart van der Horst

PMStuart · Accepted Answer

Bart, 
 You could get a key for testing from https://dkimcore.org/tools/keys.html or you could just generate one with OpenSSL - this is a good tutorial that should help. http://knowledge.ondmarc.com/en/articles/2141592-generating-2048-bits-dkim-public-and-private-keys-using-openssl-on-a-mac 
 Please let us know how testing goes. 
 Stuart