We have a couple of pro accounts with Railway and use them for deploying our website and backend systems here.

I however never switched the email services here. Which is something I would like to do. Please guide me on the best way to achive this.

Also I have a few questions because we may want to also use the email server for being able to send mass emails, partly being marketing campaigns and other eamil related notifications which are required by our system.

a. Are we permitted to use those mailboxes for marketing campaigns?
b. Is there a limit on emails sent per hour/day?
c. Any other restrictions or best-practice guidance we should know (authentication, rate limits, deliverability concerns)?

Would appreciate you getting back to me on this.