Hi! Would it be possible to open port 25 for incoming traffic? We've a B2B product that relies on inbound connections over port 25.

Maybe for enterprise?

I'm also looking for inbound port 25 access. We're on the Pro plan building an M365 email signature service — Exchange Online outbound connectors only connect on port 25 and there's no way to configure a custom port on the Microsoft side. The TCP proxy assigns random external ports which M365 can't use. Inbound port 25 would solve this completely.