Yes, to do that you would add a gateway rule or g_route rule, I would use g_route as it should also help with already queued messages:

g_route from="*" to="*@hotmail.com" dest="104.47.70.33"

Is there a way to force the use of IPv4 or IPv6 for outbound delivery to certain domains?

 

Microsoft is apparently having an issue over the last 24 hours with receiving emails to hotmail.com, live.com, and outlook.com via IPv6 – and so we’d like those emails to be delivered via IPv4 in the meantime.

 

Regards,

 

Frank