office 365

Hi, I had the greylist active on my Proxmox mail gateway, now that is disabilitated I can't still receive emails from some domains. Is it possible and where can I clean the greylist's database? I already tried to restart the server, in network I already added the O365 networks and whitelisted...

The outbound smart host connector from 365 to Proxmox is failing with a Relay access denied error. All of Microsoft's IP ranges have been added as trusted networks in the following configuration location: Configuration > Mail Proxy > Networks Here are their ranges...

I'm planning to purchase this backup solution for Msps. Does anyone know what's the main problem on this backup solution? and what are the solutions on this. Can anybody share there experience.