Hi everyone,
I am currently running Mailcow on Oracle Cloud (Ubuntu VM). As you probably know, Oracle restricts outbound SMTP traffic on port 25 by default, and their official solution relies on using their Email Delivery service or customizing Postfix as described here:
https://blogs.oracle.com/cloud-infrastructure/post/why-shared-ips-are-the-right-place-to-start-with-oci-email-delivery
The problem is that Mailcow is an out-of-the-box Docker-based solution and doesn’t provide an easy way to apply the kind of Postfix customizations Oracle requires.
I’d like to ask:
- Has anyone successfully integrated Mailcow with Oracle’s Email Delivery service?
- Alternatively, have you found a way to make Mailcow send emails using a different port (other than 25) that works on OCI?
- Or maybe there are other workarounds you are using to bypass this limitation?
Any advice or shared experience would be greatly appreciated.
Thanks a lot!