Hello Forum,
I just set up my first Proxmox environment with some VMs and CT. Working good so far.
Now I want to reach out my external mail system to forward internal mails to external. But connectiong to external mail system does not work with port 25. I can reach out every other port like 587 or 465, but not port 25.
My ISP is not blocking port 25 because I have another client in my internal network where it is working.
I disabled all firewall in Proxmox.
I do not know why exactly this port do not work and all other ports are working?
I just set up my first Proxmox environment with some VMs and CT. Working good so far.
Now I want to reach out my external mail system to forward internal mails to external. But connectiong to external mail system does not work with port 25. I can reach out every other port like 587 or 465, but not port 25.
My ISP is not blocking port 25 because I have another client in my internal network where it is working.
I disabled all firewall in Proxmox.
I do not know why exactly this port do not work and all other ports are working?