We are currently using hMailServer for sending emails, and while we managed to resolve the issues that caused the emails to end up in spam for Gmail, we don't seem to be able to resolve the issues that cause it to end up in spam for Office 365, Outlook and Hotmail recipients.
DMARC, SFP and everything that is suggested online has been set up properly.
Anyone else have an issue with this?
Emails are sent from the following domain: mundesiplot.com, through SMTP port 25