[EADGBE]

> Most any cloud provider will do, but not Amazon Web Services because its network is often blocked to prevent users from sending spam

From their installation guide, if like me, you were considering running this on EC2.

[hartzell]

AWS throttles port 25 traffic but in theory you can petition to get it opened up.

https://aws.amazon.com/premiumsupport/knowledge-center/ec2-p...