I have an Exchange Server¹ and I'm looking for an antispam and mailpop service to filter messages before they arrives in my server. Can you suggest a service like this?
¹ Microsoft Exchange Server is a mail server and calendaring server developed by Microsoft.
Probably G Suite Inbound Mail Gateway service can help. As their help center article puts it:
An inbound mail gateway is a server that all your incoming mail passes through. The gateway typically processes the mail in some way, such as archiving it or filtering spam. It then passes the mail to the mail server that delivers the mail to recipients.
