If your company wishes to have emails sent from your domain regardless of the number of recipients, then a custom DNS setup is required. This will require an IT administrator with DNS record access. Your IT administrator will be asked to setup DKIM and SPF records (they should already be familiar with these types of DNS records) specific for Illumineto. For them to get started, please have them contact firstname.lastname@example.org. We can typically turn around these requests within 24 hours.