Sorry to be late. I seriously found Many problems to resolve and adjustments to do with grommunio.. .. .....
Everything is by default.. I even reinstall from scratch to make sure that I am by default. and even that, they blocked me a second time for the same reason...
This is my Cloud provider that reported my ip as spammer and then blocked my IP for outgoing port 25.
Since that block. Temporarely, I had to configure Grommunio postfix to relay outgoing mail to another smtp agent on my network.
Yes I have SPF configured. But my understanding is even if we have SPF and Dkim, That does not avoid server to send spam.
crpd: I tried your tools and apparently this is not an open relay ,
This situation is still a mistery...
Thanks to all for your help ! I really apreciate your help!