Have a look at: https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/email-authentication-dmarc-configure?view=o365-worldwide
For 15 people IMHO you(or your tame IT guy) can setup and monitor this yourselves. One of the biggest upsides of having all the email...
It also depends what service you use for mail, how big your organisation is, risk profile etc. E.g. Smallish business using Office 365 or Google Workspace you can setup 95% of what a 3rd party security service can give you. The biggest difference is typically in the reporting/auditability/ease...
Hi, after a long time without bikes in my life, I've started my son riding which means I need to ride as well :) Off road for now but I see an adventure bike in the (near) future.